淦鑫203根系生长特征与产量及产量构成的相关性研究

以淦鑫203为材料,通过秧龄、密度和施氮量处理研究其根系生长特征与产量及产量构成的关系.结果表明:淦鑫203产量与根系总干重、根系总体积、根系伤流量以及5～15cm根系干重和体积均呈极显著或显著的正相关关系; 10～15cm,20～30cm内围根系(r≤5cm)干重和体积以及10～15cm外围(r≥5cm)根系干重和体积均与产量呈显著正相关关系;0～5cm内围根系干重与千粒重呈显著正相关;0～10cm外围根系干重和根系体积与每穗粒数呈显著正相关.研究结果还表明,影响淦鑫203产量的主要因素是每穗粒数,其与齐穗期、乳熟期的根系伤流量也呈极显著正相关关系.

Correlation Analysis of Root Growth Characteristics and Yield and Yield Components of Early Season Rice Ganxin203

Ganxin 203 was used to study the correlation between root growth characteristics and yield and yield components by treatment with different seedling ages,transplanting densities and nitrogen applications.The results showed that yield was significantly or very significantly positively correlated with weight,volume and bleeding intensity of the total root and the roots weight,volume of the soil layer 5-15 cm.Significant or very significant positive correlations between yields and roots weights,volumes of the layer 10-15 cm and 20-30 cm of inner circle(r≤5 cm) and the layer 10-15 cm of outer circle(r≥5 cm) were also observed.1000-grain weight was significantly positively correlated with root weight of the layer 0-5 cm of inner circle.Spikelet number per panicle was significantly positively correlated with root weight and volume of the layer 0-10 cm of outer circle.Besides,the results indicated that the main factor affecting grain yield was spikelet number per panicle,and it was significantly positively correlated with root bleeding intensity in full heading and milk stage.