水分和氮素对玉米苗期生长、根系形态及分布的影响

张馨月,王寅,陈健,陈安吉,王莉颖,郭晓颖,牛雅郦,张星宇,陈利东,高强

Effects of Soil Water and Nitrogen on Plant Growth, Root Morphology and Spatial Distribution of Maize at the Seedling Stage

ZHANG XinYue,WANG Yin,CHEN Jian,CHEN AnJi,WANG LiYing,GUO XiaoYing,NIU YaLi,ZHANG XingYu,CHEN LiDong,GAO Qiang

表2 水分、氮素对玉米苗期地上部干物质量、根系干重和根冠比的影响

Table 2 Effects of soil water and N rate on shoot and root dry matter and their ratio of maize plant at seedling stage

土壤水分 Soil water condition 施氮量 N rate 2016 2017 地上部干重 Shoot dry matter (g) 根系干重 Root dry matter (g) 根冠比 R/S ratio 地上部干重 Shoot dry matter (g) 根系干重 Root dry matter (g) 根冠比 R/S ratio W0 N0 26.0bB 4.8aB 0.19aA 22.9bC 5.8aC 0.25aAB N1 34.9aD 5.3aD 0.15bB 29.7aC 6.0aD 0.20bB N2 36.5aD 4.9aD 0.13bB 29.4aC 5.5aC 0.19bA W1 N0 39.6bA 8.3bA 0.21aA 32.3bB 8.8bB 0.27aA N1 63.3aC 12.4aC 0.20aA 43.4aB 10.9aC 0.25abA N2 65.7aC 11.2aC 0.17bA 48.4aB 10.7aB 0.22bA W2 N0 40.5bA 8.4cA 0.21aA 41.7bA 10.8bA 0.26aAB N1 92.8aA 16.6aA 0.18bA 72.1aA 15.8aA 0.22bAB N2 87.3aA 14.8bA 0.17bA 68.9aA 14.7aA 0.21bA W3 N0 37.2bA 7.5bA 0.20aA 41.8bA 10.1bAB 0.24aB N1 76.1aB 14.1aB 0.19abA 66.1aA 13.6aB 0.21bB N2 78.6aB 13.2aB 0.17bA 72.6aA 15.2aA 0.21bA 方差分析 ANOVA 水分 W <0.001 *** <0.001 *** 0.003 ** <0.001 *** <0.001 *** 0.031 * 氮素 N <0.001 *** <0.001 *** 0.022 * <0.001 *** <0.001 *** 0.001 ** 水分×氮素 W×N <0.001 *** <0.001 *** 0.846 ns <0.001 *** 0.002 ** 0.749 ns