Matching of Soil Phosphorus Distribution and Root Distribution in Cotton Field Based on Diffusive Gradients in Thin-Films (DGT)
文献类型： 外文期刊
作者： Yibati, Halihashi 1 ; Zhang, Yan 1 ; Feng, Gu 2 ; Yin, Frank 3 ; Li, Qingjun 1 ;
作者机构： 1.Xinjiang Acad Agr Sci, Inst Soil Fertilizer & Agr Water Conservat, 403 Nanchang Rd, Urumqi 830091, Xinjiang, Peoples R China
2.China Agr Univ, Coll Resources & Environm Sci, Beijing, Peoples R China
3.Univ Tennessee, Dept Plant Sci, Jackson, TN USA
关键词： cotton; DGT; drip irrigation; phosphorus; root
期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.58； 五年影响因子：1.608 ）
ISSN： 0010-3624
年卷期： 2022 年 53 卷 14 期
页码：
收录情况： SCI
摘要： This study aimed to optimize the period of drip phosphorus (P) fertilization to increase P migration distance in soil and content in cotton, so as to achieve the coordinated above and belowground growth of cotton plants. A field experiment was conducted to study soil P in response to P application by drip irrigation during different periods of cotton cultivation using diffusive gradients in thin films (DGT) in situ. The root length density, biomass, P content and lint yield of cotton were investigated. Compared with broadcast P fertilization before plowing, drip P fertilization after sowing significantly increased DGT-P and root length density in the top 0-15 cm soil layer, and significantly increased the biomass P content and lint yield of cotton, but reduced the root/shoot ratio. In addition, drip P fertilization at bud stage could also increase the DGT-P and root length density in the top 0-10 cm soil layer compared with the broadcast P fertilization treatment. Our results indicate that drip P fertilization after sowing is an effective method to expand the vertical migration of P in soil, increase the length, density, and P content of shoot, and improve the growth of cotton.
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