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Journal of Agriculture ›› 2020, Vol. 10 ›› Issue (4): 1-6.doi: 10.11923/j.issn.2095-4050.cjas20191000219

Special Issue: 小麦

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Supplemental Irrigation Based on Testing Soil Moisture Content: Effects on the Yield and Photosynthetic Characteristics of Winter Wheat

Yan Meiling1, Zhao Ming1, Cui Mingzhuo2, Xin Qingguo1, Sun Xiaohui1, Wang Jiangchun1(), Yin Yan1()   

  1. 1 Yantai Academy of Agriculture Science, Yantai 265500, Shandong, China
    2 Agriculture and Rural Affairs Bureau of Laixi, Laixi 2666032, Shandong, China
  • Received:2019-10-15 Revised:2019-11-13 Online:2020-04-20 Published:2020-04-20
  • Contact: Wang Jiangchun,Yin Yan E-mail:121965352@qq.com;yinyan00@163.com

Abstract:

The aim is to study the effects of supplemental irrigation based on measuring soil moisture content on yield and dry matter accumulation of winter wheat. The high-yield and high-quality winter wheat cultivar ‘Yannong 999’ was used as test material, and five water treatments were set up, including W0 (zero-irrigation in the whole growth period), Wck (traditional irrigation as a control treatment), W70, W75 and W80 are the treatments of supplemental irrigation based on testing soil moisture content, and the supplemental irrigation was 70%, 75% and 80% of soil relative water content at jointing stage and at anthesis stage, respectively. The results showed that: (1) the grain yield and water use efficiency (WUE) in W75 treatment were higher than those of other treatments, and they were 11438.85 kg/hm 2 and 25.78 kg/(hm 2·mm), respectively, which were increased by 12.12% and 21.2%, compared with Wck; (2) in W75 treatment, leaf area index at anthesis stage and grain filling stage, the flag leaf photosynthetic rate (Pn) at grain filling stage, the transfer rate of accumulated dry matter at pre-anthesis to grain, the nutrient organs at flling stage of contribution to grain, were higher than those of other treatments. In conclusion, W75 is the best irrigation solution for ‘Yannong 999’.

Key words: Wheat, Yield, Water Use Efficiency, Photosynthetic Characteristics

CLC Number: