摘要
本试验旨在观测分根灌溉(Partial Rootzone Irrigation,PRI)棉花能否在降低灌溉量的条件下维持一定的经济产量。田间实验的灌溉方式分为2种:交替隔沟灌溉(Alternative Furrow Irrigation,AFI)、固定隔沟灌溉(Fixed Furrow Irrigation,FFI)和常规灌溉(Conventional Furrow Irrigation,CFI)。结果表明,在降低30%灌溉量的条件下,棉花籽棉产量略有减少,AFI和FFI的籽棉总产量分别为CFI的92%和84%,但AFI比CFI的霜前花产量高出12%。PRI处理的棉花叶面积、株高及叶片、桃和茎的干物质量都低于CFI,但单株平均桃数与CFI没有显著差异。在降低灌溉量的条件下,由于霜前花价格比较高,AFI基本上能够维持棉花的经济产量不降低。
To investigate whether partial rootzone irrigation could save water and maintain economic yield, a field experiment on cotton under arid conditions was designed. Three treatments were applied as： alternative furrow irrigation （AFI）, fixed furrow irrigation （FFI） and conventional furrow irrigation （CFI）. The results showed that when the amount of irrigation was reduced by 30 %, PRI （AFI and FFI） produced comparable numbers of opened bolls and yields of seed cotton. The seed cotton yields of AFI and FFI were 92 % and 84 % of that of CFI, respectively. The seed cotton yield before frost of AFI was 12 % higher than that of CFI. PRI developed less leaf area, shorter plants and less dry mass of leaf, boll and stem than CFI, but the boll numbers per plant were not significantly different. The conclusion was that AFI could maintain comparable amount of seed cotton and maintain economic yield under less irrigation water.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第3期210-215,221,共7页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目(40571031)
