Assessing the impact of agro-climatic factors on pod filling of grass pea

IF 0.8 4区 生物学 Q3 AGRONOMY Legume Research Pub Date : 2018-05-20 DOI:10.18805/LR-4008
Argha Ghosh
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引用次数: 3

Abstract

Field experiments were conducted for two successive years with grass pea (cv. ‘Prateek’) sown on nine dates at weekly interval at Instructional Farm (22°58´ N, 88°31´ E), Bidhan Chandra Krishi Viswavidyalaya, West Bengal, India to investigate the impact of agroclimatic factors on pod filling of grass pea. Results showed that pod filling percentage (PFP) increased with delay in sowing dates, attaining the highest value (96.7 %) in crop sown on 30th November, beyond which it decreased gradually with further delay in sowing. Maximum and minimum temperatures, morning and afternoon soil temperatures, recorded at 5, 15 and 30 cm soil depths, morning and afternoon vapour pressure deficits at pre-flowering phase exhibited negative association and contrarily, when prevailing during reproductive and pod development phases, these parameters demonstrated positive correlation with PFP. Temperature range during reproductive phase increased with delay in sowing dates and it exhibited significant positive correlation with PFP. As demonstrated by stepwise regression analysis, Accumulated photothermal unit (APTU) prevailing at maturity phase alone accounted for 67.4 % of the total variation in PFP and together with temperature range it explained 91.3 % variation. APTU, temperature range, afternoon vapour pressure deficit and afternoon soil temperature seem to be the critical agroclimatic variables influencing the pod filling percentage significantly.
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农业气候因子对豆荚灌浆的影响评价
以草豆为原料,连续两年进行田间试验。“Prateek”)在印度西孟加拉邦Bidhan Chandra Krishi Viswavidyalaya的教学农场(22°58´N, 88°31´E),每周间隔9天播种,以研究农业气候因素对草豌豆荚的影响。结果表明,籽粒结实率(PFP)随播期的推迟而增加,在11月30日播种时达到最高值(96.7%),之后随播期的推迟而逐渐降低。在5、15和30 cm土壤深度记录的最高和最低温度、上午和下午土壤温度、花前期的上午和下午蒸汽压差与PFP呈负相关,而在繁殖和荚果发育阶段盛行时,这些参数与PFP呈正相关。生殖期温度变化幅度随播期的推迟而增大,与PFP呈显著正相关。逐步回归分析表明,成熟期累积光热单位(APTU)占PFP总变异的67.4%,与温度差一起占91.3%。APTU、温度差、下午蒸汽压亏缺和下午土壤温度是影响荚果灌浆率的关键农业气候变量。
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来源期刊
Legume Research
Legume Research AGRONOMY-
CiteScore
1.30
自引率
37.50%
发文量
256
审稿时长
6-12 weeks
期刊介绍: Legume Research An International Journal. The Journal is an official publication of Agricultural Research Communication Centre. It is designed to bring out the original research articles on genetics, breeding, physiology, bacterial avtivity, production, quality, biochemistry and seeds of legumes crops. The objective of the journal is to serve as a forum for scientific community to publish their research findings on legumes ans to provide basis for new research. Journal is being scanned in the important indexing and abstracting services.
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