不同施氮水平对青贮玉米植株氮素积累和转运的影响

王丽萍, 白岚方, 王天昊, 王宵璇, 白云鹤, 王玉芬

Effects of Different Nitrogen Levels on Nitrogen Accumulation and Transport in Silage Maize

Wang Liping, Bai Lanfang, Wang Tianhao, Wang Xiaoxuan, Bai Yunhe, Wang Yufen

表4 不同氮素水平下营养器官的氮素转运状况

Table 4 Nitrogen transport status of vegetative organs under different nitrogen levels

指标 Index 年份Year 器官 Organ 处理Treatment N0 N8 N12 N16 N20 N24 氮素转移量Nitrogen transfer amount (g) 2018 茎 0.19c 0.54b 0.54b 0.76a 0.52b 0.76a 叶 0.49bc 0.60ab 0.81a 0.64ab 0.62ab 0.56ab 苞叶 0.14b 0.19ab 0.27a 0.17b 0.19ab 0.15b 总量 0.82c 1.33b 1.62a 1.57ab 1.33b 1.47ab 2019 茎 0.19c 0.32b 0.32b 0.53a 0.35b 0.31b 叶 0.76ab 0.70abc 0.46c 0.58bc 0.65abc 0.85a 苞叶 0.20d 0.36c 0.47ab 0.37bc 0.50a 0.49a 总量 1.15c 1.38abc 1.25bc 1.48abc 1.50ab 1.65a 氮素转运率nitrogen transfer rate (%) 2018 茎 50.61b 65.04a 64.75a 66.07a 55.34b 68.72a 叶 57.11a 49.88ab 54.76ab 41.77abc 40.71bc 37.26cd 苞叶 79.81a 72.79a 78.05a 47.43b 46.94b 49.62b 整株 58.11ab 57.56ab 60.99a 51.56bc 46.57c 50.49c 2019 茎 52.38a 58.99a 54.18a 64.66a 54.58a 53.41a 叶 70.90a 54.32bc 41.96c 45.59bc 53.37bc 55.92b 苞叶 80.04b 84.74ab 90.42a 86.48ab 91.90a 86.29ab 整株 68.58a 61.20ab 56.54b 58.98b 62.26ab 61.89ab 氮素转运对籽粒的贡献率 Contribution rate of nitrogen transport to grain (%) 2018 茎 11.48cd 16.51b 16.33b 22.07a 14.81bc 24.52a 叶 28.98a 18.49b 24.26ab 18.63b 17.47b 17.93b 苞叶 8.20a 5.75ab 8.04a 4.90b 5.46ab 4.88b 合计 48.66a 40.75a 48.63a 45.60a 37.74a 47.33a 2019 茎 11.60b 13.45ab 12.18b 20.01a 14.69ab 11.44b 叶 46.17a 28.58bc 17.89c 21.47bc 26.74bc 31.13b 苞叶 12.31b 14.80ab 18.05a 13.84b 20.52a 17.78a 合计 70.08a 56.83ab 48.12b 55.32ab 61.95ab 60.35ab 收获指数Harvest index (%) 2018 72.52b 75.66a 74.56a 68.66c 68.04c 65.84c 2019 72.57a 71.70a 71.89a 70.53a 71.55a 71.31a