Study on Yield Formation and Irrigation Yield Potential of Maize under Irrigation Quota Condition

XU Chen;ZHAO Hong-xiang;YAN Wei-ping;LI Qian;LIU Xiao-long;WANG Ju-peng;LI Yan-lu;ZHANG Zhi-an;BIAN Shao-feng;College of Agronomy, Jilin Agricultural University;Institute of Agricultural Resources and Environment Research, Jilin Academy of Agricultural Sciences;College of Life Sciences, Resources and Environment Sciences, Yichun University;

maize(Zea Mays L.);;maize in semi-arid region;;irrigation yield potential;;climatic production potential;;light and temperature production potential;;Hybrid-Maize model;;agronomic characters of maize;;economic benefit of maize

In order to explore the characteristics of maize yield formation, economic benefit and the response of irrigation potential to irrigation to provided theoretical basis for irrigation yield increase in the semi-arid area of western Jilin province, the change of maize yield, agronomic character and economic benefit under four irrigation quotas was studied. The Hybrid-maize model was used to simulate the potential yield increase of maize in this area. The results showed that the yield of the treatment of 120 mm(Q1), 170 mm(Q2) and 250 mm(Q3) were significantly higher than that of the treatment of 50 mm(Q0). The LAI and plant height of Q2 and Q3 treatment were significantly higher than that of Q0 treatment. The difference between the climatic production potential value of maize and the measured yield of Q2 and Q3 treatment was small, while the climatic production potential value of maize and the measured yield of Q0 treatment was large, and the measured yield of all treatments was significantly different from the production potential value of light temperature. So 170 mm can be used as irrigation reference value for corn production in semi-arid area in the west of Jilin province and the Hybrid-Maize model can be used to predict the variation trend of maize yield in semi-arid area of western Jilin province.