Experimental study on suitable irrigation quota for emergence of maize under subsurface drip irrigation
WANG Ronglian1,2, MO Yan3, WANG Jiandong4*, REN Zhihong2, YU Jian2, SHI Jigang2
1. Vocational and Technical College of Inner Mongolia Agricultural University, Baotou, Inner Mongolia 014109, China; 2. Institute of Irrigation Technology, Inner Mongolia Institute of Water Resources Research, Huhhot, Inner Mongolia 010051, China; 3. Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; 4. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Abstract：The effects of capillary operational parameters(dripper flow, buried depth)and irrigation quota on the wetting radius of subsurface drip irrigation for three typical soils in the Inner Mongolia autonomous region were experimented by using soil box to explore solutions to the problem of difficult emergence of maize under subsurface drip irrigation. Combined with the sowing depth of maize seeds and the distances of water moving upward and downward as well as the soil water content around the seeds, a proper irrigation quota for the maize was studied to improve the emergence rate and guide actual production. The results show that the irrigation quota and soil type have statistics significance on the wetting radius(P<0.05), but the dripper flow and buried depth have not. In the clay soil, the irrigation quota of 37.5-52.5 mm can basically meet the requirement of maize emergence when the capillary is buried at a depth in 25-35 cm. In the loam soil, the irrigation quota of about 37.5 mm can basically meet the requirement of 25-30 cm capillary depth, while the irrigation quota of about 52.5 mm can essentially meet the requirement of 30-35 cm capillary depth. In the sandy loam soil, the irrigation quota of about 22.5-37.5 mm can basically meet the requirement of 25 cm capillary depth, and the irrigation quota of about 52.5 mm can basically meet the requirement of 25-35 cm depth.
王荣莲,莫彦,王建东*,任志宏,于健,史吉刚. 玉米地下滴灌适宜出苗灌水定额试验研究[J]. 排灌机械工程学报, 2020, 38(7): 708-712.
WANG Ronglian,MO Yan,WANG Jiandong*,REN Zhihong,YU Jian,SHI Jigang. Experimental study on suitable irrigation quota for emergence of maize under subsurface drip irrigation. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(7): 708-712.
