不同穗型的3个粳稻品种的抗倒性研究

试验选用不同穗型的3个粳稻品种为材料,分析其抗倒机理及与倒伏密切相关的各性状,并初步探讨穗型与倒伏之间的关系。结果表明:株高与倒伏指数呈极显著正相关;节间长、茎粗、穗部性状等均与倒伏指数存在显著相关;直立、半直立穗型品种较弯曲穗型品种倒伏指数小,株高偏矮,基部茎杆节间短且粗壮坚韧,穗短而穂颈角小,表现出较好的抗倒性能。

Study on Lodging Resistance in Japonica Rice Cultivars with Different Type Panicles

Using three cultivars with different type panicles as materials,the lodging resistance principle and characteristics related to lodging were analyzed and the relationship between different type panicles and lodging were discussed primarily.The results showed that there was a significant positive correlation between height of culm and lodging index.There was significant correlation between internode length,culm thickness,panicle characteristics and lodging index.The lodging index was less,the plant height was low,the basal internodes were short and tenacity,the panicle length was short and the neck-panicle angle was small in rice erect and semi-erect panicle type comparing with the curved panicle type.Lodging resistance ability of erect and semi-erect cultivars was better than that of the curve cultivar.