Li Pei-ling, Zhang Fu-cang
College of Engineering, Jiangxi Agricultural University, Nanchang, China.
Ying Yong Sheng Tai Xue Bao. 2010 Nov;21(11):2814-20.
Three levels (low, medium, and high) of irrigation amount and nitrogen application rate were installed in a field experiment to study the regulation effect of water and nitrogen on the cotton biomass and yield under different drip irrigation patterns. Under the irrigation patterns 1 lateral 4 rows, 2 laterals 4 rows, and 2 laterals 6 rows, when the irrigation amount increased from low (90, 140, and 140 mm) to medium level (150, 200, and 200 mm), the aboveground dry biomass was increased by 9.2%, 37.9%, and 23.5%, and the seed yield was increased by 19.1%, 14.1%, and 16.0%, respectively. When the irrigation amount increased from medium to high level (210, 260, and 260 mm), the aboveground dry biomass was increased by 15.8%, 19.1%, and 16.7%, and the seed yield was increased by 7.7%, 11.2%, and 9.5%, respectively. When the nitrogen application rate changed from low (67.6 kg x hm(-2)) to medium level (95.2 kg x hm(-2)) the aboveground dry biomass under irrigation pattern 2 laterals 4 rows was increased by 14.3%, the seed yield under irrigation pattern 1 lateral 4 rows was increased by 22. 2% , while these two parameters under other irrigation patterns had no significant change. When the nitrogen application rate changed from medium to high level (122.8 kg x hm(-2)), the seed yield under the irrigation patterns 1 lateral 4 rows, 2 laterals 4 rows, and 2 laterals 6 rows was increased by 7.4%, 13.9%, and 9.9%, respectively, but the aboveground dry biomass had no significant change. Comparing with that under the irrigation patterns 1 lateral 4 rows and 2 laterals 6 rows, the regulation effect of water and nitrogen on the aboveground dry biomass and seed yield under irrigation pattern 2 laterals 4 rows was more apparent. As for the same water and nitrogen treatments, the aboveground dry biomass and seed yield were higher under the irrigation pattern 2 laterals 4 rows, suggesting that this drip irrigation pattern was most appropriate to the water- and nitrogen management of cotton field.
通过田间试验设置了三个水平（低、中、高）的灌水量和施氮量，以研究不同滴灌模式下水分和氮素对棉花生物量和产量的调控效应。在1毛管4行、2毛管4行和2毛管6行的滴灌模式下，当灌水量从低水平（90、140和140毫米）增加到中等水平（150、200和200毫米）时，地上部干生物量分别增加了9.2%、37.9%和23.5%，籽棉产量分别增加了19.1%、14.1%和16.0%。当灌水量从中等水平增加到高水平（210、260和260毫米）时，地上部干生物量分别增加了15.8%、19.1%和16.7%，籽棉产量分别增加了7.7%、11.2%和9.5%。当施氮量从低水平（67.6千克·公顷⁻²）增加到中等水平（95.2千克·公顷⁻²）时，2毛管4行滴灌模式下的地上部干生物量增加了14.3%，1毛管4行滴灌模式下的籽棉产量增加了22.2%，而其他滴灌模式下的这两个参数无显著变化。当施氮量从中等水平增加到高水平（122.8千克·公顷⁻²）时，1毛管4行、2毛管4行和2毛管6行滴灌模式下的籽棉产量分别增加了7.4%、13.9%和9.9%，但地上部干生物量无显著变化。与1毛管4行和2毛管6行滴灌模式相比，2毛管4行滴灌模式下水分和氮素对地上部干生物量和籽棉产量的调控效应更明显。对于相同的水氮处理，2毛管4行滴灌模式下的地上部干生物量和籽棉产量更高，表明该滴灌模式最适合棉田的水氮管理。
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