排灌机械工程学报2026，Vol.44Issue(1)：66-74,9.DOI:10.3969/j.issn.1674-8530.24.0142
地下滴灌水磷耦合对紫花苜蓿生长及品质的影响
Effects of subsurface drip irrigation water-phosphorus coupling on growth and quality of alfalfa
摘要
Abstract
Determining optimal irrigation schedules and phosphorus(P)application rates is of great scientific significance for promoting water conservation,enhancing forage quality,and improving pro-duction efficiency in China's forage industry.Taking subsurface drip irrigation(SDI)in Inner Mongo-lia as the subject,a two-factor randomized complete block design was employed,setting up three irri-gation levels(expressed as percentages of field capacity)and three P application rates,with conven-tional surface irrigation treatment as the control(total of 10 treatments).The research aimed to investi-gate the effects of water-P coupling on the alfalfa growth traits,yield,forage quality,and water re-source use efficiency.Results show that under SDI,alfalfa dry hay yield increases significantly with in-creasing irrigation amount(P<0.05),whereas the water use efficiency(WUE)exhibited a trend of in-itial increase followed by a decrease with the increase in irrigation amount.Yield,crude protein(CP)content,and WUE all first increased with P application up to a threshold(120 kg/hm2),after which they declined.Crude fiber(CF),neutral detergent fiber(NDF),and acid detergent fiber(ADF)ex-hibited a trend of decreasing first and then increasing with the increase in phosphorus application.The Phosphorus partial productivity(Pp)decreased monotonically with increasing P input.Among all treat-ments,the medium irrigation level combined with moderate P application(120 kg/hm2)notably im-prove forage quality:in the first cutting,CP content increases by 12.3％and 14.2％compared to high and low P levels,respectively(P<0.05).While the CF content decreases by 7.5％and 13.9％.In the second cutting,the CP increases by 9.0％and 2.8％compared to the high and low phosphorus treat-ments,while the CF decreases by 12.1％and 8.6％,respectively.The maximum dry hay yield under SDI reaches 10,255.98 kg/hm2,with peak values of WUE(2.98 kg/m3)and Pp(108.14 kg/kg).Compared with traditional surface irrigation,SDI enhances the yield by 10.7％-49.5％,and the WUE by 19.1％-48.7％,and Pp by 14.0％-152.9％,respecitively.Taking into account the object of water conservation,yield stability,and forage quality improvement,it is recommended that the upper and lower limits for alfalfa irrigation regime maintaining soil moisture at 65％-90％of field capacity,com-bined with a P application rate of 120 kg/hm2.关键词
地下滴灌/水磷耦合/紫花苜蓿/品质/水分利用效率Key words
subsurface drip irrigation/water-phosphorus coupling/alfalfa/forage quality/water use efficiency分类
农业科技引用本文复制引用
王书吉,王传娟,王荣莲,何国辉,王建东,熊跃..地下滴灌水磷耦合对紫花苜蓿生长及品质的影响[J].排灌机械工程学报,2026,44(1):66-74,9.基金项目
内蒙古自治区科技计划项目(2022YFHH0030) （2022YFHH0030）
河北省自然科学基金资助项目(E2024402034) （E2024402034）
