文献类型： 外文期刊

作者： Yang, Fuqiang ¹ ; Du, Mingwei ¹ ; Tian, Xiaoli ¹ ; Eneji, A. Egrinya ³ ; Duan, Liusheng ¹ ; Li, Zhaohu ¹ ;

作者机构： 1.China Agr Univ, Ctr Crop Chem Control, Key Lab Crop Cultivat & Farming Syst, State Key Lab Plant Physiol & Biochem, Beijing 100193, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Ind Crops, Key Lab Cotton & Rapeseed Nanjing, Nanjing 210014, Peoples R China

3.Univ Calabar, Fac Agr, Dept Soil Sci, Calabar, Nigeria

期刊名称：FIELD CROPS RESEARCH （ 2020影响因子：5.224； 五年影响因子：6.19 ）

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收录情况： SCI

摘要： The effects of plant growth regulators (PGRs) and potassium (K) fertilizer on cotton (Gossypium hirsutum) yield have been well documented but the role of PGRs on K use efficiency is poorly understood. Our specific objective was to determine whether foliar application of PGRs could improve K use efficiency in field-grown cotton. Field experiments were conducted with or without K at two sites (Beijing and Hebei, China) varying in available soil K during 2010 and 2011, with cotton cvs. Guoxinmian3 (GX3) and SCRC28 as test materials. Foliar application of the PGRs, mepiquat chloride (MC) and Miantaijin [MTJ, a combination of MC with diethyl aminoethyl hexanoate (DA-6)] during squaring and flowering periods significantly increased the lint yield and K uptake in most situations at Beijing location and had a consistent tendency to increase lint yield across K fertilizers and years at Hebei location. The partial factor productivity (PFPK) and agronomic efficiency of K (AEK) were enhanced by the application of the PGRs in most situations in Beijing, especially in 2011 and for the cultivar GX3. Although differences in the apparent recovery efficiency of K (REK) between PGRs and control were not significant, a positive and consistent effectiveness of PGRs on REK was observed across sites, years and cultivars. Therefore, the application of PGRs would be a useful practice for improving K nutrition and lowering the cost of K fertilizer input in cotton production