关键词: 模拟降雨量, 沟垄微型集雨种植, 农田水温变化, 夏玉米

Abstract: 【Objective】 It can provide scientific basis for proper regime of ridge and furrow planting of rainfall harvesting (RFPRH) that towardly rainfall of RFPRH is elucidated.【Method】We studied the effect of RFPRH in different stimulated rainfall on summer corn (Zea mays L.) soil moisture and temperature, and analyzed the water use efficiency (WUE) in field.【Result】The result showed that in different rainfall (230 mm, 340 mm and 440 mm), the average soil moisture of 200 cm soil layer in RFPRH was higher by 2.3%, 5.2% and 4.5% respectively than the bare flat (control) during the whole growth and development period. And the soil temperature in 0~5cm soil layer increased by 1.2, 1.1 and 1.0 ℃ respectively. The determination of WUE for the whole growth and development period indicated that compared with control, the WUE of RFPRH under 230 mm and 340 mm rainfall increased by 7 kg•hm-2•mm-1 and 3.1 kg•hm-2, i.e., 61.24% and 26.90%, respectively. However, under 440 mm rainfall of the whole growth and development period, the WUE of RFPRH and control was respectively 16.55 kg•hm-2•mm-1 and 17.46 kg•hm-2•mm-1. There was no significant difference between them, and the WUE of RFPRH decreased.【Conclusion】As the precipitation is between 230 mm and 340 mm, RFPRH can ameliorate the condition of soil moisture and temperature as well as raise WUE during the whole growth and development period of summer corn.

Key words: simulated rainfall, ridge and furrow planting of rainfall harvesting, change of water and temperature in field, summer corn