摘要
为了研究滴灌条件下不同供水模式对棉花生长发育、耗水规律、产量及纤维品质的影响 ,1 997～ 1 998设置了 4种供水模式 ,即以当地畦灌条件下棉花多年平均逐月需水量 ( ET)为基础 ,各月灌水量分别设置为需水量的 85%、70 %、55%和 40 %。试验结果表明 ,棉花的株高、叶面积指数、果枝数、蕾铃数、铃重、耗水量和皮棉产量随供水量的增加而增加 ,衣分、整齐度、麦克隆值随供水量的增加有一定的递减趋势 ,但对其它纤维品质项无明显影响。通过综合评价认为 ,大田滴灌棉花供水量以需水量的 70 %为宜。在不考虑降雨的条件下 ,其供水模式为 :6月份 5d灌 1次、7月份4d灌 1次、8月份 5d灌 1次、9月份 7d灌 1次 ,每次灌水定额为 1 50 m3· hm- 2 。
An experiment in various quotas of drip irrigation for cotton planted in pits under a rain shelter was conducted in 1997～1998. Based on the monthly average water requirement(ET)of cotton under surface irrigation,four treatments of drip irrigation were arranged which had 0.85ET, 0.70ET, 0.55ET and 0.40ET of irrigating quota ,respectively. The characteristics of growth and development,water consumptive use,lint yield and fiber quality under different quotas of drip irrigation were analyzed. It has been shown that plant height, leaf area index, fruit branch, boll number, boll weight, water consumption and lint yield increase with the amount of water application. Lint percent, fiber uniformity and micronaire tend to decrease with increase in water application, but the differences of other items related with fiber quality among treatments are not significant. It has been put forward that the suitable drip pattern with 0.70ET (3450.0 m 3·hm 2 ) of irrigation quota is that cotton in June, July, August and September is irrigated by one time with 150 m 3·hm 2 of water every five days, four days, five days and seven days, respectively without considering rainfall.
出处
《棉花学报》
CSCD
北大核心
2000年第4期194-197,共4页
Cotton Science
基金
国家"九五"科技攻关项目! ( 96-0 6-0 2 -0 2 )的部分内容
关键词
滴灌
棉花
供水模式
产量
纤维品质
drip irrigation
cotton
irrigation pattern
yield
fiber quality
