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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (12): 145-151.doi: 10.11924/j.issn.1000-6850.casb14110176

Special Issue: 棉花

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Regulation of Nitrogen Fertilizer Management of Cotton Yield and Nutrient Uptake Under the Machine Pick Cotton Pattern

Nutrient Uptake Under the Machine Pick Cotton Pattern   

  1. Gong Shuangfeng1,2, Yang Tao2, Chen Baoyan2, Ma Xingwang2, Niu Xinxiang2, Lou Shanwei3(1Faculty of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi 830052;2Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Sciences, Urumqi 830091;3National Cotton Engineering Research Center, Urumqi 830091)
  • Received:2014-11-30 Revised:2014-12-08 Accepted:2014-12-11 Online:2015-05-06 Published:2015-05-06

Abstract: To study nitrogen management technology under machine pick cotton planting mode, through field experiment with different nitrogen levels, the author collected representative samples of plants with different levels of cotton production in the growth period fixed points on a regular basis under the machine pick pattern, analyzed the content of N, P, K in the dry matter, studied the absorption of the N, P, K proportion and quantity and its difference in different growth periods, in order to explore soil - cotton system nutrient uptake characteristic, and its matching relation with output changes. The results showed that as basal application of nitrogen fertilizer ratio from 0% to 40%, machine pick cotton mode could achieve super high yield of 7667.15 kg/hm2, high yield of 7376.12 kg/hm2, and general yield of 7212.33 kg/hm2. Nitrogen absorption was a major nutrient at seedling stage and bud stage under the machine pick pattern, accounted for 34.57%-48.52% of the total absorption in this growth period of the cotton. The greatest demand for nutrients was the bud stage to the flowering and boll-setting period, the absorption of N accounted for 66.14%-83.22% of all cotton yield, the absorption P2O5 accounted for 52.39%-73.07% in all of the absorption P2O5, the absorption K2O accounted for 75.57%-79.08% in all of the absorption K2O. Under machine pick cotton planting mode, the demand for N was earlier and higher, the demand for P2O5 was later and the longest. The time and strength demand for K were between the N and P2O5. Conclusion: machine pick cotton planting modes, through the management of base and topdressing proportion of nitrogen fertilizer, could control the cotton production at different levels. In super high yield cotton field, the absorption of N, P2O5 and K2O were higher than that in medium high yield and the general yield field, and its yield per unit area and the absorption of K2O was the largest. Cotton under different production levels had generally similar nutrient uptake ratio of N, P2O5, K2O ratio, but there were differences among the nutrient uptake ratios in each growth period.