ชื่อสถาบัน มหาวิทยาลัยเกษตรศาสตร์. บัณฑิตวิทยาลัย
ระดับปริญญาและรายละเอียดสาขาวิชา วิทยานิพนธ์มหาบัณฑิต. วิทยาศาสตร์ (โรคพืช)
ปีที่จบการศึกษา 2546
ชื่อนิสิต จิตรา เกาะแก้ว
ชื่อวิทยานิพนธ์ ความหลากหลายของเชื้อราบนวัชพืชที่เป็นโรคในแปลงผักและแนวทางการนำมาใช้
ควบคุมวัชพืชทางชีวภาพ
ชื่ออาจารย์ที่ปรึกษา รศ. เลขา มาโนช, Ph.D.
บทคัดย่อ
ได้เก็บตัวอย่างวัชพืชที่เป็นโรคใบจุด และใบไหม้บริเวณแปลงปลูกผักอ. กำแพงแสน จ. นครปฐม (ข้าวโพดอ่อน และหน่อไม้ฝรั่ง) และ อ. ไทรน้อย จ. นนทบุรี(ผักกาดหัว ผักคะน้า ผักกวางตุ้ง และขึ้นฉ่าย) ในเดือนเมษายน กรกฎาคม พฤศจิกายน 2546พบวัชพืช 13 ชนิดแสดงอาการเป็นโรค ได้แก่ แห้วหมู (วงศ์ Cyperaceae) ผักปลาบใบกว้าง(Commelinaceae) หญ้าขจรจบดอกเล็ก หญ้าโขย่ง หญ้าตีนกา หญ้าตีนติด หญ้าตีนนกหญ้านกสีชมพู หญ้าปากควาย (Poaceae, Graminea) ผักเบี้ยหิน (Aizoaceae) ผักขม(Amaranthaceae) น้ำนมราชสีห์ และ ผักยาง (Euphorbiaceae) นำวัชพืชมาแยกเชื้อสาเหตุโรคพืชโดยวิธี tissue transplanting และ moist chamber บนอาหารวุ้น potatodextrose agar สามารถแยกราจากวัชพืชได้จำนวน 642 สายพันธุ์ (isolate) จำแนกเป็น21 genera 34 species ได้แก่ ~iAlternaria alternata, Aspergillus flavus, Bipolarisbicolor, Chaetomella raphigera, Colletotrichum capsici, Colletotrichumgloeosporioides, Curvularia affinis, C. brachyspora, C. clavata, C. geniculata,C. inaequalis, C. intermedia, C. lunata, C. pallescens, C. penniseti,C. senegalensis, C. sorghina, Drechslera halodes, D. holmii, Emericellavareicolor, Exselohilum rostratum, Fusarium oxysporum, F. semitectum,F. solani, Myrothecium cinctum, M. verrucaria, Neosartorya fischeri,Nigrospora oryzae, Phaeotrichoconis crotalaria, Pestalotiopsis guepinii,Phoma jolyana, P. tropica, Pyricularia grisea, Sordaria~i sp., ~iStemphyliumsarciniforme, Talaromyces~i sp. และ unidentify Coelomycetes การทดสอบความสามารถในการทำให้เกิดโรคของเชื้อรากับวัชพืชและผักทดสอบ ได้ใช้เชื้อรา ~iDrechslera holmii, Exselohilum rostratum~i และ ~iStemphyliumsarciniforme~i ทดสอบกับแห้วหมู หญ้าปากควาย ผักเบี้ยหิน ผักคะน้า และ กวางตุ้งในเรือนปลูกพืชทดลอง เมื่อพืชอายุ 4 สัปดาห์ ทำแผลที่ใบและฉีดพ่น spore suspensionของเชื้อราทั้ง 3 ชนิด ที่ความเข้มข้น 10('6) spore/ ml พบว่าเชื้อรา ~iD. holmii~iที่แยกได้จากหญ้าปากควาย ทำให้หญ้าปากควายมีอาการใบจุดแผลสีน้ำตาลขนาดเล็ก พืชเกิดโรคไม่รุนแรง และรานี้ไม่สามารถทำให้พืชทดสอบอื่นเป็นโรคในสภาพแวดล้อมเดียวกันเชื้อรา ~iExselohilum rostratum~i จากหญ้าปากควาย ทำให้หญ้าปากควายเกิดโรครุนแรงพืชมีอาการจุดสีน้ำตาล เกิดกระจาย ทั่วใบ แผลขยายใหญ่รวมกันเป็นแผลไหม้ ไม่พบว่าเชื้อรา ~iExselohilum rostratum~i ทำให้พืชทดสอบชนิดอื่นเป็นโรคในสภาพแวดล้อมเดียวกัน เชื้อรา ~iStemphylium sarciniforme~i จากผักเบี้ยหินทำให้ผักเบี้ยหินเป็นโรคใบจุด แผลขยายตัวรวมกันเป็นแผลขนาดใหญ่ บริเวณแผลมีเชื้อราเจริญอยู่ และเชื้อรา ~iStemphylium sarciniforme~i ไม่ทำให้พืชทดสอบอื่น ๆ เป็นโรคในสภาพแวดล้อมเดียวกัน ดังนั้น ~iExselohilum rostratum~i และ ~iStemphyliumsarciniforme~i เป็นเชื้อราที่มีศักยภาพในการพิจารณานำมาใช้ในการควบคุมวัชพืช เช่นหญ้าปากควายและผักเบี้ยหินในแปลงผักทางชีววิธี
25/3/52
งานค้นERIC
1. Controversy over Biomass Plant at Florida State Heats up (EJ828980)
Author(s):Mangan, Katherine
Source:Chronicle of Higher Education, v55 n19 pA16 Jan 2009
Pub Date:2009-01-16
Pub Type(s):Journal Articles; Reports - Descriptive
Peer-Reviewed:No
Descriptors:Energy Conservation; Educational Facilities Improvement; Energy Management; Controversial Issues (Course Content); Advocacy; Pollution; Ecological Factors; Strategic Planning
Abstract:This article reports that Florida State University officials are gearing up for what could be another bruising battle this month over a proposed biomass plant that could bring the campus cleaner, cheaper energy and monetary support for alternative-energy research. Or, it could bring noise and pollution to a nearby neighborhood, according to activists who have threatened to sue if the plant is approved. The City of Tallahassee has scheduled a public hearing for January 28 on the plant, which would be built on 21 acres of leased Florida State University land as part of the university's master plan. The proposed biomass plant would heat wood chips and other byproducts and convert them to gas. The gas would then be burned to produce electricity. The project would create hundreds of jobs during the construction phase and dozens of long-term jobs. The plant, which would be located near the university's engineering school, would also provide a hands-on laboratory for students to study energy efficiency. But opponents, including a half-dozen Florida State scientists, the NAACP, and some local residents, argue that the plant could endanger the health of people living in the predominantly minority neighborhood where the property is located. Note:The following two links are not-applicable for text-based browsers or screen-reading software. Show Hide Full Abstract
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Author(s):Mangan, Katherine
Source:Chronicle of Higher Education, v55 n19 pA16 Jan 2009
Pub Date:2009-01-16
Pub Type(s):Journal Articles; Reports - Descriptive
Peer-Reviewed:No
Descriptors:Energy Conservation; Educational Facilities Improvement; Energy Management; Controversial Issues (Course Content); Advocacy; Pollution; Ecological Factors; Strategic Planning
Abstract:This article reports that Florida State University officials are gearing up for what could be another bruising battle this month over a proposed biomass plant that could bring the campus cleaner, cheaper energy and monetary support for alternative-energy research. Or, it could bring noise and pollution to a nearby neighborhood, according to activists who have threatened to sue if the plant is approved. The City of Tallahassee has scheduled a public hearing for January 28 on the plant, which would be built on 21 acres of leased Florida State University land as part of the university's master plan. The proposed biomass plant would heat wood chips and other byproducts and convert them to gas. The gas would then be burned to produce electricity. The project would create hundreds of jobs during the construction phase and dozens of long-term jobs. The plant, which would be located near the university's engineering school, would also provide a hands-on laboratory for students to study energy efficiency. But opponents, including a half-dozen Florida State scientists, the NAACP, and some local residents, argue that the plant could endanger the health of people living in the predominantly minority neighborhood where the property is located. Note:The following two links are not-applicable for text-based browsers or screen-reading software. Show Hide Full Abstract
Related Items: Show Related Items
Full-Text Availability Options:
More Info: Help Tutorial Help Finding Full Text
ERIC does not have permission to provide full text for this record. Click here to learn about other options.More Info: Help Tutorial More Info: Help Find in a Library
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20/3/52
งานค้นวิทยานิพนธ์ฉบับเต็ม
อนุกรมวิธาน นิเวศวิทยา พืชกลุ่มเฟินที่เป็นพืชอิงอาศัย และพืชเกาะหิน บริเวณดอยเชียงดาว เชียงใหม่
Taxonomy and ecology of epiphytic and lithophytic ptericophytes at Doi Chiang Dao, Chiang Mai
cert.pdf
ref.pdf
chapter5.pdf
chapter4.pdf
chapter3.pdf
chapter2.pdf
chapter1.pdf
toc.pdf
ack.pdf
abst.pdf
tp.pdf
appdx.pdf
Taxonomy and ecology of epiphytic and lithophytic ptericophytes at Doi Chiang Dao, Chiang Mai
cert.pdf
ref.pdf
chapter5.pdf
chapter4.pdf
chapter3.pdf
chapter2.pdf
chapter1.pdf
toc.pdf
ack.pdf
abst.pdf
tp.pdf
appdx.pdf
งานค้นebook
0599170476
Pub. No.
9918063
Author
Chaivisuthangkura, Parin.
Title
Characterization of the role of apoplastic invertase in plant development.
Physical
189 p.
Note
Source: Dissertation Abstracts International, Volume: 60-02, Section: B, page: 0487.
Adviser: Johann Peter Gogarten.
Dissertation Note
Thesis (Ph.D.)--The University of Connecticut, 1998.
Summary
The cell wall acid invertase has been proposed to be involved in establishing metabolic sinks by maintaining a steep sucrose concentration gradient between source and sink organs. Sucrose unloaded to the apoplast is converted to hexoses by cell wall invertase, thereby allowing the continued efflux of sucrose from the phloem. Hexose molecules are further transported to sink tissues by hexose/H+ symporters. The cooperation of hexose transporters and extracellular cell wall invertase is important for providing non photosynthetic tissues with organic compounds.
Using reverse genetics the role of cell wall invertase in higher plants has been investigated. Transgenic carrots expressing carrot cell wall invertase in both sense and antisense orientation or a reporter gene under the direction of either an ethylene inducible promoter or a tissue specific promoter were generated. The transgenic carrot calli expressing sense construct under the ethylene inducible promoter show reduced apoplastic invertase activity relative to the control. The reduction of cell wall invertase could be due to cosuppression.
A second generation of Arabidopsis antisense constructs were generated. Defined regions within the third exon of Arabidopsis cell wall invertase isoform 1 (AINV1) and isoform 2 (AINV2) were cloned in antisense orientation behind the CaMV 35S promoter. Two independently transformed lines of AINV1 antisense plants display a short silique phenotype. Anthers in these two transgenic lines fail to extend beyond the stigmas. As a result siliques of these two transformants contain a large number of unfertilized ovules and a small number of developing seeds due to a perturbation in the development of the stamens. Data on reciprocal crosses between wild-type and transgenic lines indicate that the antisense transgene has no effect on the functionality of pollen grains and carpel development after pollination. Western analyses indicate that apoplastic invertase was increased in flowers and siliques of these two transformants. Northern blot data showed that this increase was due to a higher expression of AINV2 transcripts. The cause of this stimulation may be a physiological compensation in AINV1 antisense plants. The obtained data provide evidence for the function of invertase in sink tissue development and the interrelationships of invertase isoforms in higher plants.
Subject
Biology, Molecular. (271)
Biology, Plant Physiology. (26)
Agriculture, Plant Culture. (14)
University
The University of Connecticut. (19)
Host Item Entry
Dissertation Abstracts International 60-02B.
Advisor
Gogarten, Johann Peter, advisor
Degree
Ph.D.
Year
1998
URL Object
Pdf File
Pub. No.
9918063
Author
Chaivisuthangkura, Parin.
Title
Characterization of the role of apoplastic invertase in plant development.
Physical
189 p.
Note
Source: Dissertation Abstracts International, Volume: 60-02, Section: B, page: 0487.
Adviser: Johann Peter Gogarten.
Dissertation Note
Thesis (Ph.D.)--The University of Connecticut, 1998.
Summary
The cell wall acid invertase has been proposed to be involved in establishing metabolic sinks by maintaining a steep sucrose concentration gradient between source and sink organs. Sucrose unloaded to the apoplast is converted to hexoses by cell wall invertase, thereby allowing the continued efflux of sucrose from the phloem. Hexose molecules are further transported to sink tissues by hexose/H+ symporters. The cooperation of hexose transporters and extracellular cell wall invertase is important for providing non photosynthetic tissues with organic compounds.
Using reverse genetics the role of cell wall invertase in higher plants has been investigated. Transgenic carrots expressing carrot cell wall invertase in both sense and antisense orientation or a reporter gene under the direction of either an ethylene inducible promoter or a tissue specific promoter were generated. The transgenic carrot calli expressing sense construct under the ethylene inducible promoter show reduced apoplastic invertase activity relative to the control. The reduction of cell wall invertase could be due to cosuppression.
A second generation of Arabidopsis antisense constructs were generated. Defined regions within the third exon of Arabidopsis cell wall invertase isoform 1 (AINV1) and isoform 2 (AINV2) were cloned in antisense orientation behind the CaMV 35S promoter. Two independently transformed lines of AINV1 antisense plants display a short silique phenotype. Anthers in these two transgenic lines fail to extend beyond the stigmas. As a result siliques of these two transformants contain a large number of unfertilized ovules and a small number of developing seeds due to a perturbation in the development of the stamens. Data on reciprocal crosses between wild-type and transgenic lines indicate that the antisense transgene has no effect on the functionality of pollen grains and carpel development after pollination. Western analyses indicate that apoplastic invertase was increased in flowers and siliques of these two transformants. Northern blot data showed that this increase was due to a higher expression of AINV2 transcripts. The cause of this stimulation may be a physiological compensation in AINV1 antisense plants. The obtained data provide evidence for the function of invertase in sink tissue development and the interrelationships of invertase isoforms in higher plants.
Subject
Biology, Molecular. (271)
Biology, Plant Physiology. (26)
Agriculture, Plant Culture. (14)
University
The University of Connecticut. (19)
Host Item Entry
Dissertation Abstracts International 60-02B.
Advisor
Gogarten, Johann Peter, advisor
Degree
Ph.D.
Year
1998
URL Object
Pdf File
งานค้นSpringerlink
PIG IRON
EXPERIMENTAL INDUSTRIAL PLANT
FOI~ CALCINING LUMP SIDERITE
N. V. Fedorenko, V. I. Kitaev,
V. V. Chervotkin, A. G. Zhunev,
E. S. Gusev, and N. V. Neryakhin
UDC 669.1.622.782.4
A calcining-concentration plant (CCP) consisting of nine shaft furnaces with a total volume of 400 m 3 and design
output of 750,000 tons of raw siderite per year was put into service at the Bakal Ore Preparation Combine in
1972.
Siderite with a size of 60-100 mm is delivered from the crushing-grading plant (CGP) by a conveyer belt to
the receiving hoppers of the CCP and then by double-bell charging apparatuses into the furnaces. Loading and unloading
the ore is periodic. The rate of unloading the calcined product is regulated by changing the periodicity of
turning on the shuttle feeder. After cooling in louvered hoppers the siderite is sent to the screening building. The
lump product is shipped to metallurgical plants and the fines 8(5)-0 mm are sent to the stockyard.
The shaft furnace (Fig. i) consists of four vertical chambers (shafts) with a height of 7 m and cross section of
0.7 x 2.2 m which are separated by partitions (cores). From an outside furnace the combustion products of natural
gas pass along flues through the gas-distribution ports into the calcining zone and penetrate the siderite from the bottom
upward. The technical characteristics of the furnace (design) are presented below:
Output of calcined siderite, ton/h . . . . . . . . . . . . . . . . . . . . . . . . . 7.4
Temperature in calcining zone, *C . . . . . . . . . . . . . . . . . . . . . . . . . 950-1050
Consumption of natural gas, mS/h . . . . . . . . . . . . . . . . . . . . . . . . . 340-380
Volume of furnace chamber, m 3 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.8
Number of burners (GIP-6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Quantity of air for diluting combustion products in furnace, m3/h . . . . . 2000
Quantity of air for cooling 1 ton of siderite, m 3 . . . . . . . . . . . . . . . . . 3000
Time siderite is in furnace by zones, h
heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
calcining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1
hardening and precooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
We see from the operating indices of the plant presented in Table 1 that the average monthly quality of the
initial siderite was relatively constant. However, its chemical composition according to the average daily samples
had considerable fluctuations. Thus, the content of Fe varied from 23.5 to 41.7%, Fe20 s from 4 to 35%, CaO from
I to 11%, and S from 0.08 to 2.0%. Such variations are due to the absence of blending. After calcining the content
of iron increased by 10.94-12.51%.
The high residual calcination losses and insufficient removal of sulfur were due to the low calcination temperature
(in the flues the temperature did not exceed 1200~ Investigations showed that at this temperature the design
calcination regime is not attained. The causes of disturbance of the thermal conditions of the furnaces were nonrhythmic
operation of the plant owing to nonroutine repairs which in some months reached 8-9% of calendar time,
impossibiIity of delivering siderite from a blending stockyard, and the small capacity of the receiving hoppers of the
CCP, which did not provide continuous operation of the furnaces in the event the arrival of ore from the CGP stopped
Chelyabinsk Scientific-Research Institute of Metallurgy. Bakal Ore Preparation Combine. Ural Scientific-
Research and Planning Institute of Concentration and Mechanical Proce~ing of Minerals. Translated from Metallurg,
No. 10, pp. 9-10, October, 1973.
_9 1974 Consultants Bureau, a division of Plenum Publishing Corporation, 227 West l?th Street, New York, N. Y. 10011. No part
of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical,
photocopying, microfilming, recording or otherwise, without written permission of the publisher. A copy of this article
is available from the publisher for $15.00.
EXPERIMENTAL INDUSTRIAL PLANT
FOI~ CALCINING LUMP SIDERITE
N. V. Fedorenko, V. I. Kitaev,
V. V. Chervotkin, A. G. Zhunev,
E. S. Gusev, and N. V. Neryakhin
UDC 669.1.622.782.4
A calcining-concentration plant (CCP) consisting of nine shaft furnaces with a total volume of 400 m 3 and design
output of 750,000 tons of raw siderite per year was put into service at the Bakal Ore Preparation Combine in
1972.
Siderite with a size of 60-100 mm is delivered from the crushing-grading plant (CGP) by a conveyer belt to
the receiving hoppers of the CCP and then by double-bell charging apparatuses into the furnaces. Loading and unloading
the ore is periodic. The rate of unloading the calcined product is regulated by changing the periodicity of
turning on the shuttle feeder. After cooling in louvered hoppers the siderite is sent to the screening building. The
lump product is shipped to metallurgical plants and the fines 8(5)-0 mm are sent to the stockyard.
The shaft furnace (Fig. i) consists of four vertical chambers (shafts) with a height of 7 m and cross section of
0.7 x 2.2 m which are separated by partitions (cores). From an outside furnace the combustion products of natural
gas pass along flues through the gas-distribution ports into the calcining zone and penetrate the siderite from the bottom
upward. The technical characteristics of the furnace (design) are presented below:
Output of calcined siderite, ton/h . . . . . . . . . . . . . . . . . . . . . . . . . 7.4
Temperature in calcining zone, *C . . . . . . . . . . . . . . . . . . . . . . . . . 950-1050
Consumption of natural gas, mS/h . . . . . . . . . . . . . . . . . . . . . . . . . 340-380
Volume of furnace chamber, m 3 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.8
Number of burners (GIP-6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Quantity of air for diluting combustion products in furnace, m3/h . . . . . 2000
Quantity of air for cooling 1 ton of siderite, m 3 . . . . . . . . . . . . . . . . . 3000
Time siderite is in furnace by zones, h
heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
calcining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1
hardening and precooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
We see from the operating indices of the plant presented in Table 1 that the average monthly quality of the
initial siderite was relatively constant. However, its chemical composition according to the average daily samples
had considerable fluctuations. Thus, the content of Fe varied from 23.5 to 41.7%, Fe20 s from 4 to 35%, CaO from
I to 11%, and S from 0.08 to 2.0%. Such variations are due to the absence of blending. After calcining the content
of iron increased by 10.94-12.51%.
The high residual calcination losses and insufficient removal of sulfur were due to the low calcination temperature
(in the flues the temperature did not exceed 1200~ Investigations showed that at this temperature the design
calcination regime is not attained. The causes of disturbance of the thermal conditions of the furnaces were nonrhythmic
operation of the plant owing to nonroutine repairs which in some months reached 8-9% of calendar time,
impossibiIity of delivering siderite from a blending stockyard, and the small capacity of the receiving hoppers of the
CCP, which did not provide continuous operation of the furnaces in the event the arrival of ore from the CGP stopped
Chelyabinsk Scientific-Research Institute of Metallurgy. Bakal Ore Preparation Combine. Ural Scientific-
Research and Planning Institute of Concentration and Mechanical Proce~ing of Minerals. Translated from Metallurg,
No. 10, pp. 9-10, October, 1973.
_9 1974 Consultants Bureau, a division of Plenum Publishing Corporation, 227 West l?th Street, New York, N. Y. 10011. No part
of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical,
photocopying, microfilming, recording or otherwise, without written permission of the publisher. A copy of this article
is available from the publisher for $15.00.
13/3/52
วัชพืช
วัชพืช เป็นพืชที่สามารถพบเห็นอยู่ทั่วไปทั้งในบริเวณบ้าน สถานที่ราชการ ตามท้องทุ่งนา ในสวนในไร่ สนามกอล์ฟ แม่น้ำลำคลอง สถานที่ท่องเที่ยวต่างๆ ที่รกร้างว่างเปล่า หรือริมถนนโดยทั่วไป จะพบเห็นวัชพืชหลายชนิดเจริญเติบโตอยู่ อาจเป็นเพราะได้พบเห็นอยู่เสมอจนกลายเป็นความเคยชิน จึงมิได้ให้ความสนใจและมีความรู้สึกว่าวัชพืชมีแต่โทษ ทำความเสียหายให้แก่การเกษตรกรรม เป็นอุปสรรคต่อการคมนาคมทั้งทางบกและทางน้ำ ทำให้
สถานที่ขาดความเป็นระเบียบเรียบร้อยสวยงาม แต่แท้ที่จริงแล้ววัชพืชก็มีประโยชน์มากมายมหาศาล วัชพืชหลายๆ ชนิดเป็นสมุนไพรรักษาโรคต่างๆ ได้ แม้กระทั่งโรคที่ไม่สามารถรักษาได้ด้วยการแพทย์แผนปัจจุบัน วัชพืชหลายชนิดเป็นอาหารสำหรับมนุษย์และสัตว์เลี้ยง ใช้เป็นวัสดุในการหัตถกรรมอุตสาหกรรมครัวเรือน บางชนิดก็มีความสวยงาม ใช้ประดับตบแต่งสวนให้สวยงามได้ หรืออย่างน้อยที่สุด วัชพืชจะช่วยยึดดินไม่ให้เกิดการกัดเซาะพังทลาย ช่วยกรองมลพิษในอากาศซึ่งนับวันมลพิษในอากาศใกล้จะถึงจุดวิกฤตทุกขณะ ดังนั้นเรื่องราวเกี่ยวกับวัชพืชจึงนับว่าน่าสนใจน่าเรียนรู้
สถานที่ขาดความเป็นระเบียบเรียบร้อยสวยงาม แต่แท้ที่จริงแล้ววัชพืชก็มีประโยชน์มากมายมหาศาล วัชพืชหลายๆ ชนิดเป็นสมุนไพรรักษาโรคต่างๆ ได้ แม้กระทั่งโรคที่ไม่สามารถรักษาได้ด้วยการแพทย์แผนปัจจุบัน วัชพืชหลายชนิดเป็นอาหารสำหรับมนุษย์และสัตว์เลี้ยง ใช้เป็นวัสดุในการหัตถกรรมอุตสาหกรรมครัวเรือน บางชนิดก็มีความสวยงาม ใช้ประดับตบแต่งสวนให้สวยงามได้ หรืออย่างน้อยที่สุด วัชพืชจะช่วยยึดดินไม่ให้เกิดการกัดเซาะพังทลาย ช่วยกรองมลพิษในอากาศซึ่งนับวันมลพิษในอากาศใกล้จะถึงจุดวิกฤตทุกขณะ ดังนั้นเรื่องราวเกี่ยวกับวัชพืชจึงนับว่าน่าสนใจน่าเรียนรู้
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