干旱地区农业研究2017，Vol.35Issue(2)：201-206,6.DOI:10.7606/j.issn.1000-7601.2017.02.33
覆膜畦灌条件下不同灌溉定额对饲用甜高粱农艺性状及生物产量的影响
Effect of irrigation quota on agronomic trait and biomass of feeding sweet sorghum under condition of border irrigation with mulching
摘要
Abstract
In order to explore the optimal irrigation quota and water-saving effect suitable for feeding sweet sorghum under condition of border irrigation with mulching,a field experimem was conducted to study the effect of the irrigation quota (2 400,3 000,3 600,4 200,4 800 m3·hm-2 respectively) on soil water content,agronomic trait and biomass.Results showed that soil water content within 0 ～ 100 cm soil layer first increased and then decreased in sweet sorghum growth period,and irrigation quota had significant effect on 0 ～ 100 cm soil moisture distribution at the 62th d after sowing.Irrigation quota which was less than 2 400 m3· hm-2 seriously affected the sweet sorghum growing (such as reducing plant height,enlarging stem stalk,decreasing accumulative dry matter).Sugar content of sweet sorghum stalk juice had a trend of increase with the decrease of irrigation quota.The increase of sweet sorghum biomass was attributed to factors such as plant height,LAI and numbers of stem nodes (R2 =0.97,0.81,0.59 respectively).In conclusion,for watersaving and increasing the biomass,irrigation schedule with irrigation quota of 3 600 m3· hm-2 (irrigation frequency was 4 times) was thereby recommended as the optional practice to increase the biomass (25.29 t· hm-2) and WUE (5.76 kg · m-3) under condition of border irrigation with mulching.关键词
饲用甜高粱/灌溉定额/农艺性状/生物产量/覆膜畦灌Key words
feeding sweet sorghum/irrigation quota/agronomic trait/biomass/border irrigation with mulching分类
农业科技引用本文复制引用
王增丽,樊晓康,温广贵..覆膜畦灌条件下不同灌溉定额对饲用甜高粱农艺性状及生物产量的影响[J].干旱地区农业研究,2017,35(2):201-206,6.基金项目
水利部公益性行业科研专项(201501017) （201501017）
甘肃省陇原青年创新人才扶持计划、甘肃省水利科研推广项目 （）
