湖北农业科学 ›› 2020, Vol. 59 ›› Issue (3): 38-41.doi: 10.14088/j.cnki.issn0439-8114.2020.03.008

• 资源·环境 • 上一篇    下一篇

钾肥用量对稻-油轮作作物产量及钾素利用的影响

邵文胜1, 周雄1, 何德志1, 田贵生2, 鲁剑巍2   

  1. 1.武穴市农业农村局梅川镇农业技术推广中心,湖北 武穴 435400;
    2.华中农业大学,a.微量元素研究中心;b.资源与环境学院,武汉 430070
  • 收稿日期:2019-05-18 发布日期:2020-05-11
  • 作者简介:邵文胜(1970-),男,湖北武穴人,农艺师,主要从事土壤肥料研究,(电话)18507256178(电子信箱)3021697482@qq.com。
  • 基金资助:
    国家重点研发计划项目(2016YFD0200108); 中央高校基本科研业务费专项基金项目(2662017JC010)

Effect of potassium fertilizer application rate on yield and potassium use efficiency of rice-rape rotation system

SHAO Wen-sheng1, ZHOU Xiong1, HE De-zhi1, TIAN Gui-sheng2, LU Jian-wei2   

  1. 1.Meichuan Town Agricultural Technology Promotion Center,Wuxue City Agricultural and Rural Bureau,Wuxue 435400,Hubei;
    2a.Microelement Research Center;
    2b.College of Resources and Environment, Huazhong Agricultural University,Wuhan 430070,China
  • Received:2019-05-18 Published:2020-05-11

摘要: 以水稻-油菜轮作系统为研究对象,设3个钾肥用量,分别为K2O用量0、120、240 kg/hm2,其中K2O用量为120 kg/hm2是当地测土配方推荐钾肥量,通过一个轮作周期的田间试验,研究了钾肥用量对水稻-油菜轮作系统作物产量、钾素吸收和利用特性的影响。结果表明,水稻-油菜轮作系统作物产量随钾肥用量的增加先增加后降低,在K2O用量为120 kg/hm2时达最高。水稻季和油菜季的钾肥利用效率随钾肥用量的增加而下降,且水稻季钾肥利用率明显低于油菜季。在本试验条件下,K2O用量为120 kg/hm2时,湖北省武穴市水稻-油菜轮作系统可获得较高的钾肥利用率,并可获得高产。

关键词: 水稻-油菜轮作系统, 产量, 钾肥用量, 钾肥利用率

Abstract: Taking rice-rape rotation system as research object, the effects of potassium (K) application rates on rice-rape rotation system crop yield, K accumulation and use efficiency of rice and ripe were studied by fields experiments with K2O rates of 0, 120 and 240 kg/hm2. In which, the K2O rate of 120 kg/hm2 is recommended amount of potassium fertilizer for local soil test formulations. The results showed that crop yield of the rice-rape rotation system was increased at the first and then gradually decreased with the increment of the K application rates,and reached maxima under the K fertilizer application rate of K2O 120 kg/hm2. The K fertilizer utilization efficiency of rice and rape were decreased significantly with the increment of the K application rates. In conclusion, under this field experiment conditions, the optimal K fertilizer application amount is K2O 120 kg/hm2 in Wuxue city, Hubei province.

Key words: rice-rape rotation system, yield, K application rate, K use efficiency

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