增密减氮对不同类型水稻品种颖花形成的影响

种浩天, 尚程, 张运波, 黄礼英

Effects of Dense Planting with Reduced Nitrogen Application on Spikelet Formation of Different Types of Rice Varieties

Chong Haotian, Shang Cheng, Zhang Yunbo, Huang Liying

表4 干物质、有效积温、积累辐射量和全氮吸收的颖花生产效率

Table 4 Spikelet production efficiency based on total dry matter weight, effectively accumulated temperature, accumulated radiation from transplanting to maturity and total N uptake at maturity

品种 Variety 氮处理 Nitrogen 密度处理 Density 干物质 Dry matter weight (g/m2) 有效积温 Effective accumulated temperature (℃) 积累辐射量 Accumulated radiation (MJ/m2) 全氮吸收 Total Nitrogen uptake (g/m2) 颖花生产效率Production efficiency of spikelets 干物质 Dry matter (No./g) 积温 Effective accumulated temperature [No./(m2·℃)] 辐射 Accumulated radiation (No./MJ) 氮素 Nitrogen (×103) [No./(mg?N)] 甬优4949 Yongyou 4949 减氮 正常密度 1386.2c 1644.4 1455.6 13.2b 32.1a 27.0c 30.5c 3.38a 增密 1535.8b 1644.4 1455.6 13.8b 30.5a 28.5bc 32.2bc 3.39a 正常氮 正常密度 1592.8b 1687.7 1492.7 17.4a 31.3a 29.5b 33.4b 2.86b 增密 1745.0a 1698.3 1496.7 17.9a 30.6a 31.4a 35.6a 2.97b 扬两优6号 Yangliangyou 6 减氮 正常密度 1407.2c 1908.3 1662.2 12.3c 23.7a 17.5c 20.1c 2.71a 增密 1655.7a 1908.3 1662.2 14.0b 23.7a 20.5b 23.6ab 2.81a 正常氮 正常密度 1545.5b 1917.5 1674.7 16.8a 24.4a 19.7b 22.5b 2.25b 增密 1707.7a 1925.7 1709.5 16.9a 25.4a 22.5a 25.3a 2.56a 黄华占 Huanghuazhan 减氮 正常密度 1243.0c 1775.8 1558.3 11.4c 31.7b 22.2c 25.3c 3.47ab 增密 1332.9b 1775.8 1558.3 12.9b 35.3a 26.5ab 30.2ab 3.71a 正常氮 正常密度 1378.3b 1782.9 1561.1 14.9a 36.3a 28.0a 31.9a 3.35b 增密 1475.0a 1782.9 1561.1 14.9a 30.4b 25.1b 28.7b 3.00c 氮肥处理Nitrogen 减氮Reduced N rate 1426.8B 1776.2 1558.7 12.9B 29.5A 23.7B 27.0B 3.25A 正常氮Normal N rate 1574.0A 1799.2 1582.6 16.5A 29.7A 26.0A 29.6A 2.83B 密度处理Density 正常密度Normal density 1425.5B 1786.1 1567.4 14.3A 29.9A 24.0B 27.3B 3.00A 增密Increase density 1575.4A 1789.2 1573.9 15.1A 29.30A 25.7A 29.3A 3.07A 品种Varieties 甬优4949 Yongyou 4949 1564.9A 1668.7 1475.1 15.6A 31.1B 29.1A 32.9A 3.15A 扬两优6号Yangliangyou 6 1579.0A 1914.9 1677.2 15.0A 24.3C 20.0C 22.9C 2.58B 黄华占Huanghuazhan 1357.3B 1779.3 1559.7 13.5B 33.4A 25.4B 29.0B 3.38A 差异分析Analysis of variance 氮肥Nitrogen（N） ** — — ** ns ** ** ** 密度Density（D） ** — — ns ns * * ns 品种Varieties（V） ** — — * ** ** ** ** 氮肥×密度N×D ns — — ns ns * * ns 氮肥×品种N×V ns — — ns ns ns ns ns 密度×品种D×V ns — — ns ns ns ns ns 氮肥×密度×品种N×D×V — — ns * * * *