灌溉排水学报2017，Vol.36Issue(3)：20-25,6.DOI:10.13522/j.cnki.ggps.2017.03.004
不同灌溉定额对向日葵生物量累积动态及产量构成要素的影响
Dynamic of Biomass, Yield and their Components of Sunflowers under Different Irrigation Modes
摘要
Abstract
A field experiment was conducted in Hetao Irrigation District to evaluate the effects of different irrigation regimes on biomass accumulation,allocation,and irrigation water-use efficiency in sunflower,including five treatments:local conventional irrigation amount (pre-sowing 135 mm,rewatering 90 mm),A1 (pre-sowing 108 mm,rewatering 90 mm),A2 (pre-sowing 81 mm,rewatering 90 mm),B1 (pre-sowing 108 mm,rewatering 72 mm) and B2 (pre-sowing 81 mm,rewatering 72 mm),respectively.The results showed that with the proper reduction of pre-sowing irrigation amount,then rewatering,the significant compensation growth was expressed in biomass accumulation of sunflower,and the compensation effect of biomass of full rewatering was 16.45％ ～32.24％ higher than the deficit rewatering.Under the same amount of pre-sowing irrigation,the final biomass of full rewatering was significantly higher than deficit rewatering in the harvest period,and the percentage of grain were significantly different (P＜0.05) among different rewatering treatments in the harvest period.The percentage of grain to final biomass ofAl treatment was the highest,reaching 43.02％.With the proper reduction ofpre-sowing irrigation amount (108 mm),then full rewatering,the economic yield were significantly improve (P＜0.05).But,under the same pre sowing irrigation level,economic yield of the reduction of rewatering irrigation amount would be significantly reduced during bolls-flowering.Comprehensive evaluation of the effect indexes of correlation on different irrigation modes by subordinate function showed that A1 treatment was optimal.And economic yield and irrigation water-use efficiency of A1 treatment were 8.47％ and 23.19％ higher than CK,respectively,because the average number of grains per plant and seed-setting rate were significantly increased.Research shows that suitable sunflower irrigation regime is 108 mm of pre-sowing irrigation,and 90 mm of rewatering during bolls-flowering in Hetao Irrigation District.关键词
河套灌区/向日葵/播前灌溉/生物量/隶属函数法Key words
Hetao Irrigation District/sunflower/pre-sowing irrigation/biomass/subordinate function分类
农业科技引用本文复制引用
徐昭,史海滨,李仙岳,郑倩,倪东宁,刘美含..不同灌溉定额对向日葵生物量累积动态及产量构成要素的影响[J].灌溉排水学报,2017,36(3):20-25,6.基金项目
国家自然科学基金项目(51269015 （）
51539005) （）
