Effects of water-fertilizer coupling on field cotton growth and yield under fertigation in Xinjiang
Li Zhijun1,2,3, Wang Haidong1,2,3, Zhang Fucang1,2,3, Wu Lifeng1,2,3, Wang Zhao1,2,3, Zhou Jianwei4
1.College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China; 3.Institute of Water-saving Agriculture in Arid Areas of China, Yangling, Shaanxi 712100, China; 4.Institute of Water and Soil Fertilizer, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China
Abstract:A field experiment was conducted to study the effects of water and fertilizer couling on field cotton growth and yield under fertigation in Xinjiang. The experiment designed three irrigation water levels and five NPK fertilizer application levels. Results showed that the irrigation water had a significant effect on plant height, effective bolls, 100-bolls weight, seed cotton yield, water use efficiency(WUE)and irrigation water use efficiency(IWUE). It had an extremely significant effect on the leaf area index, which increased as the irrigation water increased. Fertilization had an extremely significant effect on the plant height, leaf area index, effective bolls, 100-bolls weight and seed cotton yield. The effect of the coupling of water and fertilization on effective bolls, 100-bolls weight and seed cotton yield reached an extremely significant level. There was an adverse effect of overfertilization on crop growth. The highest nutrient use efficiency was obtained with the irrigation water 60% ETc and fertilizer rate 300 kg/hm2∶120 kg/hm2∶60 kg/hm2(ωN∶ωP2O5∶ωK2O), while the irrigation water 100% ETc and fertilizer rate 150 kg/hm2∶60 kg/hm2∶30 kg/hm2(ωN∶ωP2O5∶ωK2O)received the highest nutrient recovery rate. The irrigation water 100% ETc and fertilizer rate 300 kg/hm2∶120 kg/hm2∶60 kg/hm2(ωN∶ωP2O5∶ωK2O)were the best fertigation strategy for cotton in Xinjiang.
李志军,,, 王海东,,, 张富仓,,, 吴立峰,,, 王钊,,, 周建伟. 新疆滴灌施肥棉花生长和产量的水肥耦合效应[J]. 排灌机械工程学报, 2015, 33(12): 1069-1077.
Li Zhijun,,, Wang Haidong,,, Zhang Fucang,,, Wu Lifeng,,, Wang Zhao,,, Zhou Jianwei. Effects of water-fertilizer coupling on field cotton growth and yield under fertigation in Xinjiang. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(12): 1069-1077.
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