Effects of Different Irrigation Quotas on Plant Traits,Yield and Water Use Efficiency of Summer Maize in Northwest Shandong Province
Li Yuanxin
Yang Jing
Li Xiaoguang
Yi Houzhen
Zhou Hang
Shi Zhaoyin
Chu Pengfei
Meng Weiwei
Abstract：In order to clarify the effects of different irrigation quotas on plant traits,yield and water use efficiency of summer maize in the northwest Shandong Province,this experiment was carried out using'Zheng-dan 958'as test material.In 2023,the rain-sheltered test pits with bottoms were used to set 8 irrigation quota treatments of 80,160,240,280,320,360,400 and 480 mm in the whole growth period,which were recor-ded as M1,M2,M3,M4,M5,M6,M7 and M8,respectively.The effects of different treatments on maize plant traits,physiological and biochemical indices,dry matter accumulation,yield components and water use efficiency were studied.The results showed that when the irrigation quota was 320 mm(M5 treatment),the plant height,number of nodes under the ear,length under the ear and leaf area index of summer maize were the largest,the plant height increased significantly by 21.8％compared with M1 treatment,and the leaf area index increased significantly.The leaf SPAD value of M5 treatment was the largest,the activities of catalase(CAT)and ascorbate peroxidase(APX)and the malondialdehyde(MDA)content were the lowest,and the ascorbate peroxidase(APX)activity was slight higher than that of M6 treatment with no significant difference.The dry weight of maize ears of the M5 treatment was significantly higher than that of the other treatments,which increased by 129.5％compared with M1 treatment;the root dry weight was significantly higher than that of the other treatments except M6 treatment.The water use efficiency and irrigation water use efficiency of M5 treatment were significantly higher than those of the other treatments,which increased by 131.9％and 20.6％respectively compared with M1 treatment.Under the experimental conditions,the irrigation quota of 320 mm could not only achieve high yield of summer maize in the northwest plain of Shandong Province,but also sig-nificantly improve the plant growth,dry matter accumulation and water use efficiency,so promote high yield and high efficiency of maize production.
Keywords：Irrigation quotaSummer maizePlant traitsWater use efficiencyYield
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 57-63 )