Effects of irrigation amount, planting density and row spacing on grain yield of spring maize in Hexi Region
XU Xinyu, FAN Junliang*, LAI Zhenlin, YANG Rui
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China
Abstract：This study aimed to investigate the effects of irrigation amount, planting density and row spacing on the growth, grain yield, water and fertilizer use efficiency of spring maize under drip irrigation with plastic film mulch in the Hexi Region, so as to save water and improve maize production in this region. The experiment was carried out at the Shiyanghe Experimental Station for Water-saving in Agriculture and Ecology of China Agricultural University from April to September 2020. There were two irrigation levels, W1 and W2, two planting densities, D1 and D2, and three row spacing arrangements, L1, L2 and L3 which resulted in a total of 12 treatments with three replicates. Plant height, leaf area index(LAI)and dry matter accumulation of maize were measured, and water and fertilizer use efficiencies were analyzed. The results showed that under the same irrigation amount, the plant height and LAI of the D2 treatment were significantly higher than those of the D1 treatment. Increasing the planting density increased the dry matter accumulation, yield, and water use efficiency of the maize population. The dry matter accumulation and yield of W2D2L3 treatment were the highest at 96.45 t/hm2 and 17.72 t/hm2, respectively, and the water use efficiency(WUE)of W1D2L3 treatment was the highest at 3.57 kg/m3. The interaction of irrigation level and planting density had a significant impact on yield and its components(P<0.05); the interaction of irrigation level, planting density and row spacing had a significant impact on the harvest index(P<0.05), which has a extremely significant impact on crop water consumption(ET)and WUE(P<0.01). It can be seen that all irrigation level, planting density and row spacing have a certain regulating effect on the population growth structure, water consumption, grain yield, and water and fertilizer use efficiency of spring maize, ranking as planting density, row spacing and irrigation level. Therefore, ″80%ETc + 100 000 plants/hm2 + wide and narrow planting″ was selected as the optimal combination for spring maize production in the Hexi Region.
许新宇,范军亮*,赖珍林,杨睿. 灌水量、种植密度和行距对河西地区春玉米产量的影响[J]. 排灌机械工程学报, 2023, 41(3): 305-312.
XU Xinyu,FAN Junliang*,LAI Zhenlin,YANG Rui. Effects of irrigation amount, planting density and row spacing on grain yield of spring maize in Hexi Region. Journal of Drainage and Irrigation Machinery Engin, 2023, 41(3): 305-312.
