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- Title
氮肥滴施次数及比例对机采棉产量和氮肥利用率的影响.
- Authors
殷星; 禄涛; 曾庆涛; 张文; 耿亚红; 杨振华; 周华; 闵伟; 冶军; 侯振安
- Abstract
【Objective】 A field experiment was conducted to examine the effects of nitrogen (N) fertigation frequency and proportion on yield and N use efficiency of machine-picked cotton under drip irrigation conditions from 2017 to 2018. 【Methods】 The experiment consisted of 5 treatments: (1) control (no N fertilization (CK); (2) N fertigation 8 times plus former-lower-latter-higher (farmers conventional fertigation, N8-B), (3) N fertigation 8 times plus former-higher-latter-lower (N8-F), (4) N fertigation 10 times plus former-lower-latter-higher (N10-B), (5) N fertigation 10 times plus former-higher-latter-lower (N10-F). 【Results】 Increasing the frequency of N fertigation significantly increased the dry matter weight and N uptake of cotton in both 2017 and 2018. Under the same N fertigation frequency, the dry matter weight and N uptake of cotton were significantly higher in the former-higher-latter-lower treatments (F) than those in the former-lower-latter-higher treatments (B). Compared with N8 treatments, the yield of cotton in N10 treatments increased by 17.9% and 34.7% respectively, in 2017 and 2018; and NUE of cotton increased 17.9 and 34.7 percentage point, respectively. The yield of cotton in N8-F and N10-F treatments were 7.0% - 11.1% and 12.1% - 21.5% higher than those under N8-B and N10-B treatments. NUE of N8-F and N10-F treatments were 12.0-26.5 and 11.2-24.9 percentage points higher than those of N8-B and N10-B treatments, respectively. 【Conclusion 】 Increasing N fertigation frequency and the proportions at the early stage can promote the growth and N uptake, and increase the yield and NUE of machine-picked cotton.
- Publication
Xinjiang Agricultural Sciences, 2019, Vol 56, Issue 11, p1971
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2019.11.002