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通过3个水平的灌水量和施氮量(低、中、高)的田间试验,研究了田间不同滴灌方式下棉花生物量和产量的水氮调控效应.结果表明:在1带4行、2带4行、2带6行滴灌模式下灌水量由低(分别为90、140、140mm)到中(分别为150、200、200mm)时,地上部干物质量分别提高9.2%、37.9%和23.5%,籽棉产量分别提高19.1%、14.1%和16.0%;灌水量由中到高(分别为210、260、260mm)时,地上部干物质量分别提高15.8%、19.1%和16.7%,籽棉产量分别提高7.7%、11.2%和9.5%.施氮量由低(67.6kg·hm-2)到中(95.2kg·hm-2)时,地上部干物质量2带4行模式提高14.3%,籽棉产量1带4行模式提高22.2%,其他模式无显著变化;施氮量由中到高(122.8kg·hm-2)时,籽棉产量3种模式分别提高7.4%、13.9%和9.9%,地上部干物质量无显著变化.与1带4行和2带6行模式相比,2带4行模式地上部干物质量和籽棉产量的水氮调控效应更明显,相同水氮处理下2带4行地上部干物质量和籽棉产量均高于2带6行和1带4行.表明2带4行是最有利于滴灌棉花田间水氮管理的模式.
The effects of water and nitrogen on cotton biomass and yield under different drip irrigation methods were studied in field experiments with three levels of irrigation amount and nitrogen application rate (low, medium and high) The dry weight of above-ground parts increased by 9.2%, 37.9% and 23.5% when the irrigation volume was low (90,140,140mm, respectively) % And seed cotton yield increased by 19.1%, 14.1% and 16.0% respectively. When the irrigation volume increased from middle to high (210, 260 and 260mm respectively), the shoot dry weight increased by 15.8%, 19.1% and 16.7% Increased by 7.7%, 11.2% and 9.5% respectively.When the N application rate increased from 67.6kg · hm-2 to 95.2kg · hm-2, the shoot dry weight increased by 14.3% 1 with 4-row mode increased by 22.2% and no significant changes with other modes. When the N application rate increased from middle to high (122.8kg · hm-2), the seed cotton yield increased by 7.4%, 13.9% and 9.9% There was no significant change in the dry matter mass.Compared with the 4-lane and 2-lane 6-lane mode, the water and nitrogen regulation effects of above-ground dry matter weight and seed cotton yield in 2-lane and 4-row modes were more obvious. Under the same water and nitrogen treatments, unit Substances and 2 were higher than the yield of seed cotton belt 1 with 6 rows and 4 rows. 2 shows that with 4 rows of cotton most beneficial drip water and nitrogen management model.