Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (24): 51-56.doi: 10.11924/j.issn.1000-6850.casb2021-0839

Special Issue: 生物技术 小麦

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Water-Fertilizer Coupling: Effect on the Efficiency of Reduced Fertilization for Wheat in Purple Soil

DENG Limei1,2(), CHEN Xiaofen3, WANG Xuan1,2, CUI Rongyang1,2, ZHOU Tao1,2, LIU Gangcai1()   

  1. 1Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu 610041
    2University of Chinese Academy of Sciences, Beijing 100049
    3Agricultural Service Center of Daxing Hui Ethnic Township, Yanting County, Mianyang City, Sichuan Province, Yanting, Sichuan 621600
  • Received:2021-08-31 Revised:2021-12-05 Online:2022-08-25 Published:2022-08-22
  • Contact: LIU Gangcai E-mail:denglimei@imde.ac.cn;liugc@imde.ac.cn

Abstract:

The objective is to reveal the influence characteristics of water-fertilizer coupling on wheat and the efficiency of reduced fertilization in purple soil. Treatments of water-fertilizer coupling were conducted by plot and pot experiments at Qingfeng village and Yanting National Field Science Observation and Research Station of Farmland Ecosystem in Yanting County of Sichuan Province from October of 2018 to May of 2020. The effects of water-fertilizer coupling on the main properties of wheat and soil were measured. Results showed that water-fertilizer coupling had obvious promotion effect on wheat growth and grain yield, with the biggest positive effect being achieved when the watering amount was about 80% of the field water capacity. The wheat yield was not significantly decreased when fertilizer application amount was reduced by 10%-20%. Water-fertilizer coupling improved the availability of soil nutrients and the activity of soil enzymes, showing obvious promoting effect. Therefore, water-fertilizer coupling is an effective measure to improve the efficiency of reduced fertilization in purple soil region, so as to effectively prevent and control non-point source pollution.

Key words: wheat, water-fertilizer coupling, purple soil, efficiency of reduced fertilization

CLC Number: