您好，欢迎访问山东省农业科学院文献资源数据库平台

Estimating on-farm wheat yield response to potassium and potassium uptake requirement in China

文献类型： 外文期刊

作者： Zhan, Ai 1 ; Zou, Chunqin 1 ; Ye, Youliang 2 ; Liu, Zhaohui 3 ; Cui, Zhenling 1 ; Chen, Xinping 1 ;

作者机构： 1.China Agr Univ, Key Lab Plant Soil Interact, Ctr Resources Environm & Food Secur, Coll Resources & Environm Sci,Minist Educ, Beijing 100193, Peoples R China

2.Henan Agr Univ, Coll Resources & Environm Sci, Zhengzhou 450000, Peoples R China

3.Shandong Acad Agr Sci, Jinan 250100, Peoples R China

关键词： Winter wheat;Potassium application;Grain yield;Potassium requirement

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

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Understanding grain yield response to potassium fertilizer supply and potassium uptake requirements is essential for devising optimized potassium fertilizer management policies in China. Currently, potassium fertilization is often ignored due to high natural levels of potassium in the soil. We conducted 836 on-farm experiments at 209 sites in China to quantify wheat (Triticum aestivum L.) grain yield response to potassium application rates, and evaluate potassium uptake requirements with increasing grain yield. Across all 209 sites, wheat grain yield increased by 70% from 3.3 Mg ha(-1) at a control level to 5.6 Mg ha(-1) for recommended potassium treatments (RKR, 102 kg K2O ha(-1)). With 150% RKR treatments, no yield gains were achieved, while there was a notable decrease in potassium use efficiency. The potassium uptake requirements per Mg of grain (K-req) increased from 21.1 kg with RKR treatments to 21.9 kg with 150% RKR treatments, which indicated that a luxury potassium uptake occurred under excessive potassium application. Under RKR treatments, K-req decreased from 23.8 kg with <4.5 Mg ha(-1) to 20.2 kg with >7.5 Mg ha(-1), which was attributed to the increase of the harvest index (from 45.5% to 48.6%) and decline in grain potassium concentrations (from 4.7 g kg(-1) to 4.0 g kg(-1)). When the grain yield was <7.5 Mg ha(-1), potassium accumulation during post-anthesis was lower than that at pre-anthesis, by 78.5 kg ha(-1) and -30.8 kg ha(-1) with <6 Mg ha(-1) and 6-7.5 Mg ha(-1) yield ranges, respectively, but higher than that at pre-anthesis when the grain yield was >7.5 Mg ha(-1) and by 18.2 kg ha(-1). In summary, potassium fertilization can increase wheat grain yield in China and total potassium uptake requirements were shown to decrease with increasing grain yield. This suggests that potassium optimization must be taken into account in management decisions for high-yielding wheat production in China. (C) 2016 Elsevier B.V. All rights reserved.

  • 相关文献

[1]Morphological and yield responses of winter wheat (Triticum aestivum L.) to raised bed planting in Northern China. Wang, Fahong,Kong, Ling'an,Li, Shengdong,Si, Jisheng,Feng, Bo,Zhang, Bin,Wang, Fahong,Sayre, Ken. 2011

[2]EFFECTS OF NITROGEN APPLICATION ON BIOMASS ACCUMULATION, REMOBILIZATION, AND SOIL WATER CONTENTS IN A RAINFED WHEAT FIELD. Duan, Wenxue,Yu, Zhenwen,Zhang, Yongli,Wang, Dong,Shi, Yu,Duan, Wenxue,Xu, Zhenzhu. 2014

[3]Depth of nitrogen fertiliser placement affects nitrogen accumulation, translocation and nitrate-nitrogen content in soil of rainfed wheat. Duan, W.,Shi, Y.,Zhang, Y.,Yu, Zh.,Duan, W.,Zhao, J.. 2015

[4]Comparison of conventional, flood irrigated, flat planting with furrow irrigated, raised bed planting for winter wheat in China. Fahong, W,Wang, X,Sayre, K. 2004

[5]Extracting Winter Wheat Planting Area Based on Cropping System with Remote Sensing. Li, Shaokun,Zhu, Zhenlin,Sui, Xueyan,Zhang, Xiaodong,Zhu, Zhenlin,Sun, Xiaoqing,Li, Shaokun. 2011

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：山东省农业科学院文献资源数据库平台

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台