bwm shnsy khshwrzy最新文献

The effect of climate change on potato (Solanum tuberosum L.) production in Feridonshahr region of Isfahan I - growth and development. 气候变化对伊斯法罕Feridonshahr地区马铃薯生产的影响——生长发育。

bwm shnsy khshwrzy Pub Date : 2017-02-19 DOI: 10.22067/JAG.V9I4.53529

Z. Adavi, M. R. Tadayon

{"title":"The effect of climate change on potato (Solanum tuberosum L.) production in Feridonshahr region of Isfahan I - growth and development.","authors":"Z. Adavi, M. R. Tadayon","doi":"10.22067/JAG.V9I4.53529","DOIUrl":"https://doi.org/10.22067/JAG.V9I4.53529","url":null,"abstract":"هدف از این مطالعه شبیه‌سازی اثرات تغییر اقلیم بر مراحل فنولوژیکی، شاخص سطح برگ، عملکرد زیست‌توده و غده سیب‌زمینی (Solanum tuberosum L.) در شرایط تغییر اقلیم آینده منطقه فریدون‌شهر اصفهان بود. برای این منظور پیش بینی دو مدل گردش عمومی HadCM3 و IPCM4 تحت سه سناریوی A1B، B1 و A2 در سال‌های 2030، 2060 و 2090 به‌کار گرفته شد. برای شبیه‌سازی پارامترهای اقلیمی از مدل LARS-WG و برای شبیه‌سازی مراحل رشد سیب‌زمینی از مدل SUBSTOR-Potato و نرم‌افزار DSSAT استفاده گردید. نتایج ارزیابی مدل SUBSTOR-potato نشان داد مدل برآورد مناسبی (RMSE≤10) برای پیش‌بینی صفات عملکرد غده، حداکثر شاخص سطح برگ، روز تا گلدهی و روز تا رسیدگی فیزیولوژیک گیاه سیب‌زمینی در شرایط آب و هوایی فریدون‌شهر دارا می‌باشد. نتایج شبیه‌سازی نشان داد که در تمام سناریوهای مورد بررسی، رشد و نمو سیب-زمینی تحت تأثیر پدیده تغییر اقلیم در آینده قرار خواهد گرفت و عملکرد آن نسبت به سال مبنا کاهش خواهد یافت. به‌طوری‌که بیشترین کاهش عملکرد غده در سناریوی A2 و در سال 2090 برای هر دو مدل گردش عمومی HadCM3 و IPCM4 شبیه‌سازی شد. میزان کاهش عملکرد غده در سناریوی B1 نسبت به دو سناریوی دیگر کمتر بود. گیاه سیب‌زمینی در سناریوی A2 در مقایسه با دو سناریوی دیگر از شاخص سطح برگ کمتری برخوردار بود. همچنین طول مرحله کاشت تا گلدهی و مدت زمان رسیدگی سیب‌زمینی در منطقه فریدون‌شهر در شرایط تغییر اقلیم آینده نسبت به شرایط فعلی کاهش خواهد یافت که دلیل اصلی این کاهش، افزایش درجه حرارت (بسته به سناریوهای مختلف بین 1/1 تا 4/5 درجه سانتی‌گراد) و در نتیجه افزایش سرعت رشد گیاه در شرایط تغییر اقلیم آینده می‌باشد.","PeriodicalId":34586,"journal":{"name":"bwm shnsy khshwrzy","volume":"9 1","pages":"1117-1135"},"PeriodicalIF":0.0,"publicationDate":"2017-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42400406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

THE EFFECT OF CLIMATE CHANGE ON THE ECONOMY OF RAIN FED WHEAT (A CASE STUDY IN NORTHERN KHORASAN) 气候变化对雨养小麦经济的影响(以呼罗珊北部为例)

bwm shnsy khshwrzy Pub Date : 2014-09-14 DOI: 10.22067/JAG.V6I2.39370

F. Zarakani, G. Kamali, A. Chizari

{"title":"THE EFFECT OF CLIMATE CHANGE ON THE ECONOMY OF RAIN FED WHEAT (A CASE STUDY IN NORTHERN KHORASAN)","authors":"F. Zarakani, G. Kamali, A. Chizari","doi":"10.22067/JAG.V6I2.39370","DOIUrl":"https://doi.org/10.22067/JAG.V6I2.39370","url":null,"abstract":"Climate change is a phenomenon that has made the most concern in communities and decision making centers. This phenomenon has important effects on different aspects of human life. One of the most important crops that are affected by climate change is wheat. Accordingly, data and information of Northern Khorasan have been used to study the effects of climate change on rain-fed wheat yield. For this reason, climatic data of Bojnourd synoptic station from 1984 to 2010 and economic data of Northern Khorasan rain-fed wheat available in Jihad Keshavarzi administration were used to analyze previous situation and detecting climate change and determine a relationship between economic yield and climatic variables. To determine relationship between economy of rain-fed wheat and regional climate, maximum and minimum temperature, annual precipitation and also cost of wheat production, price of wheat and barley, and cropping area have been selected as independent variables and yield and income of wheat have been selected as dependent variables. In addition, for prediction of the amount of climatic elements in future, numerical climatic meso scale models HADCM and LARS-WG have been used. The results showed that climate change occurred in 30 past years and there is significant relation between logarithm of maximum and minimum temperature and annual precipitation, and wheat yield. Using resulted equation for yield and income of wheat and the results from numerical climatic model showing 0.5 degree Celsius increasing of minimum and maximum temperature and decreasing 25 mm of precipitation from 2010 to 2039 in the region, increasing in wheat yield (10 kg.ha-1) and income (250000 t. thousand Rial-1) have been predicted in this region.","PeriodicalId":34586,"journal":{"name":"bwm shnsy khshwrzy","volume":"6 1","pages":"301-310"},"PeriodicalIF":0.0,"publicationDate":"2014-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68587502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

INTRODUCTION OF AN INDEX FOR DROUGHT EVALUATION USING PRINCIPLE COMPONENTS ANALYSIS 介绍了用主成分分析法评价干旱的指标

bwm shnsy khshwrzy Pub Date : 2014-03-03 DOI: 10.22067/JAG.V5I4.33008

S. Farhangfar, J. Kambouzia, R. Deihimfard, S. Soufizadeh, B. Mirbagheri

{"title":"INTRODUCTION OF AN INDEX FOR DROUGHT EVALUATION USING PRINCIPLE COMPONENTS ANALYSIS","authors":"S. Farhangfar, J. Kambouzia, R. Deihimfard, S. Soufizadeh, B. Mirbagheri","doi":"10.22067/JAG.V5I4.33008","DOIUrl":"https://doi.org/10.22067/JAG.V5I4.33008","url":null,"abstract":"استان اصفهان در مرکز ایران واقع شده و دارای اقلیم خشک و نیمه خشک است. در سال های اخیر کمبود آب در این منطقه شدت گرفته و تولید محصولات کشاورزی را تحت تأثیر قرار داده است. گندم از جمله محصولات مهم این استان است. در این تحقیق با استفاده از داده های بلند مدت اقلیمی موجود و تکنیک تجزیه به مؤلفه های اصلی (PCA)، شاخصی برای ارزیابی خشکی (DEI) در استان ارائه شد و شهرستان های مورد مطالعه از نظر شدت خشکی مورد بررسی قرار گرفتند. علاوه بر DEI برای کمی کردن اثر خشکی، شاخص خشکی (AI) در مقیاس های زمانی مختلف در هر شهرستان محاسبه شد. داده های اقلیمی و عملکرد دانه ی گندم به ترتیب از سازمان هواشناسی کشور و جهاد کشاورزی استان اصفهان جمع آوری شدند. جهت حذف اثرات مثبت بهبود ژنتیکی و مدیریت زراعی بر عملکرد گندم، روش هموار سازی نمایی اجرا شد. بر اساس DEI، اصفهان، شهرضا، گلپایگان و نظنز اقلیم نیمه خشک و اردستان، خوروبیابانک، کاشان و نایین اقلیم خشک داشتند. بر اساس AI، شهرستان های مورد مطالعه دارای اقلیم خشک بودند. مقدار AI، تنها در گلپایگان در حالی که DEI، در اصفهان، شهرضا، گلپایگان، کاشان و نطنز از مقادیر عددی بالا تری برخوردار بودند. نتایج PCA نشان داد که در این شهرستان ها درجه حرارت حداکثر (ضریب 51/3) مهم ترین متغیر در تعیین شرایط اقلیمی و میانگین سرعت وزش باد (ضریب 27/2) نیز بر شرایط اقلیمی این مناطق مؤثر بوده است. همبستگی ضعیف شاخص های خشکی محاسبه شده با عملکرد نشان داد که استفاده از سایر شاخص های اقلیمی در توجیه نوسانات عملکرد گندم در این استان مناسب تر است.","PeriodicalId":34586,"journal":{"name":"bwm shnsy khshwrzy","volume":"5 1","pages":"452-461"},"PeriodicalIF":0.0,"publicationDate":"2014-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68587484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HEAT UNITS’ REQUIRENMENT OF DIFFERENT MATURING MAIZE (ZEA MAYS L.) HYBRIDS BASED ON THERMAL INDICES IN MASHHAD 不同成熟玉米的热单位需要量(玉米品种)根据马什哈德的热指数杂交

bwm shnsy khshwrzy Pub Date : 2011-08-02 DOI: 10.22067/JAG.V2I2.7633

Choukan Rajab, H. Moghadam

引用次数: 1

COMPARISON OF TWO ORGANIC FERTILIZERS ALONG WITH ZN AND B ELEMENTS ON CONCENTRATION, UPTAKE OF NUTRIENTS AND SOME GROWTH PARAMETERS IN MILLET (PANICUM MILIACEUM L.) 两种有机肥配锌、b元素对谷子(panicum milium l .)浓度、养分吸收及生长参数的影响

bwm shnsy khshwrzy Pub Date : 2011-04-10 DOI: 10.22067/JAG.V3I1.9967

T. Hoseini, A. Astaraei, R. Khorasani, H. Emami

{"title":"COMPARISON OF TWO ORGANIC FERTILIZERS ALONG WITH ZN AND B ELEMENTS ON CONCENTRATION, UPTAKE OF NUTRIENTS AND SOME GROWTH PARAMETERS IN MILLET (PANICUM MILIACEUM L.)","authors":"T. Hoseini, A. Astaraei, R. Khorasani, H. Emami","doi":"10.22067/JAG.V3I1.9967","DOIUrl":"https://doi.org/10.22067/JAG.V3I1.9967","url":null,"abstract":"A field experiment was conducted to study the effect of two organic fertilizers along with zinc and boron elements on some growth parameters, concentration and uptake of nutrients in millet (Panicum miliaceum L.) by using factorial based on randomized completely block design with three replications in Qaen region, Iran. The main treatments were municipal solid waste compost and cow manure (each at 0 and 25 t.ha-1) and sub treatments were elements of Zn (0, 50 kg.ha-1) and B (0, 10 kg.ha-1) using their respective ZnSO4 and H3BO3 salts. Results showed that treatments interaction had significant effects on total dry matter yield, number of tillers per plant and plant height of Millet. The highest total dry matter production was achieved by interaction of cow manure along with Zn and B elements. Concentrations of N, Fe, Zn, B and Cu in plant were increased significantly by treatments interaction effects compared to control. Interaction effect of organic fertilizers with B (in the absence of Zn) enhanced plant B concentration significantly, whereas, interaction of organic fertilizers with Zn (in the absence of B) decreased B concentration in plant. The highest plant uptake of N, P, K, Zn, and B was observed in plots with cow manure and Zn and B elements.","PeriodicalId":34586,"journal":{"name":"bwm shnsy khshwrzy","volume":"3 1","pages":"17-24"},"PeriodicalIF":0.0,"publicationDate":"2011-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68587873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INFLUENCE OF VARIOUS RATES OF TRIPLE SUPER PHOSPHATE AND FERTILIZER EFFICIENCY OF BROADCASTING AND BANDING METHODS ON YIELD AND YIELD COMPONENTS OF CORN (ZEA MAYS L.) 三超磷肥不同施量及播带法肥效对玉米产量及产量构成的影响

bwm shnsy khshwrzy Pub Date : 2011-04-10 DOI: 10.22067/JAG.V3I1.9980

M. Loveimi, A. Bakhshandeh, A. Chaab

{"title":"INFLUENCE OF VARIOUS RATES OF TRIPLE SUPER PHOSPHATE AND FERTILIZER EFFICIENCY OF BROADCASTING AND BANDING METHODS ON YIELD AND YIELD COMPONENTS OF CORN (ZEA MAYS L.)","authors":"M. Loveimi, A. Bakhshandeh, A. Chaab","doi":"10.22067/JAG.V3I1.9980","DOIUrl":"https://doi.org/10.22067/JAG.V3I1.9980","url":null,"abstract":"In order to investigate the effect of various rates of phosphorus fertilizer and efficiency amount of broadcasting and banding methods on yield and yield components of corn (Zea mays L.), a field experiment were arranged in a split-plot design based on a randomized complete block design with four replications at the Research field, Ramin Agricultural and Natural Resources University, Mollathani, Khouzestan, Iran, during 2008 growing season. Treatments included: phosphorus various amounts (0, 150 and 300 kg.ha-1) as main factor from triple-super phosphate source, and fertilization methods (broadcast fertilizer, banding fertilizer in depths of 10, 20 cm and double banding application in depths of 10 and 20 cm), as sub factor. The results indicated that interaction of phosphorus fertilizer various rates and fertilization methods did not have a significant effect on yield and yield components of corn grain (exception biological yield). However, all various phosphorus fertilizer rates and fertilization methods caused significant differences among grain yield, harvest index and the number grain per row. Between the number of grains per m2 and 1000-Kernel were signification differences while fertilizer rates were not significantly different on traits. The number row per ear was not affected by any treatments. In addition, grain yield of double banding treatment was 34% higher than broadcast fertilizer (control) and in fertilizer rate of 150 kg.ha-1 36% it was higher than 0 kg.ha-1.","PeriodicalId":34586,"journal":{"name":"bwm shnsy khshwrzy","volume":"3 1","pages":"131-137"},"PeriodicalIF":0.0,"publicationDate":"2011-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68587437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0