再生稻根干物质量及根系活力与产量的相关性研究

The correlation of dry biomass and activity of root system with grain yield in ratoon rice(Oryza sativaL)

对不同施N水平、不同品种再生稻根干物质量及根系活力与产量的相关性研究结果表明 ,再生稻头季稻产量与根系干物质量及根系活力密切相关 ;再生稻再生分蘖的生长发育依赖于头季稻残留的根系 ,再生季稻穗数及产量与头季稻成熟期和再生季稻齐穗期的根系机能呈极显著线性正相关 。

The correlations of the dry biomass and activity of root system with grain yield in ratoon rice in several varieties and different N application levels were studied.The results show that the grain yield of the first crop of ratoon rice shows significant correlation with dry matter weight (DMW)and activity of root system;the development of ratoon tillers depends on the remnant root system of the first crop;panicle numbers and grain yield of the second crop of ratoon rice show a high significant positive correlation with the activity of root system at mature stage of the first crop and at full heading stage of the second crop,and show a parabola correlation with N applications of bud fertilizer.