甘蓝型油菜主茎理化特性与倒伏的关系及抗倒性评价

Relation between Physico-chemical Properties of Stem and Lodging and Evaluation of Lodging Resistance in Rapeseed(Brassica napus L.)

以抗倒性不同的8个甘蓝型油菜品种为供试材料,分析了主茎的理化特性、株高、单株产量和倒伏情况,结果表明:中双9号的抗倒性最强,其主茎蛋白质含量最高,其他理化指标在品种间无明显区别;主茎钾含量与蛋白质、电阻率呈显著负相关;但蛋白质与含水量、粗纤维与抗折力、钙含量与单株产量、株高与粗纤维、株高与倒伏指数、倒伏指数与倒伏系数等均呈显著正相关;单株产量与倒伏指数呈极显著正相关。利用倒伏系数(单株产量/株高×抗折强度)评价油菜倒伏性是可行的。

The physico-chemical properties of stem,plant height, yield per plant and lodging were compared in 8 rapeseed varieties. The lodging resistance of Zhongshuang No. 9 was stronger than other varieties, and its protein content was the highest as well, while there was no significant difference in other physico-chemical properties~ The correlation analysis showed that K content had significant negative correlations with protein content and resistivity, but there were significant positive correlation between protein content and water content, coarse tiber and strength of resisting disjunction, Ca content and yield per plant, plant height and coarse tiber, plant height and lodging index, and lodging index and lodging coefficient. The yield per plant prsented highly significant positive correlation with lodging index. The lodging coefficient（yield per plant/ plant height X strength of resisting disjunction）was a practical method for evaluating the lodging.