黑龙江省水稻主栽品种（系）节水抗旱栽培下的抗倒性研究

倒伏是严重影响水稻产量与品质的一个因素。通过常规灌溉和节水抗旱栽培模式下与水稻抗倒性密切相关的性状指标的变化,探讨了黑龙江省各积温带水稻主栽品种（系）的抗倒性。结果表明,节水抗旱处理使部分品种（系）的倒伏指数减小,倒2节带鞘抗折力增加,节间干物质量增加,节间横切面积减少,茎壁增厚;抗倒性、抗旱力指数和实测产量等指标表现均较高的品种（系）第一积温带有龙稻16和龙稻24,第二积温带有绥粳4号、绥粳17、绥粳18、北稻7号、绥锦089290,第三积温带有绥粳15、龙粳56、龙粳51、龙粳58、龙粳20、龙交08119、龙丰12500、龙粳3100和龙粳1424,第四积温带有龙粳24、龙粳1525、龙交13S6,第五积温带有龙粳4344。通过对倒伏性状的调查研究,了解各积温带主栽品种（系）的抗倒性情况,可为黑龙江省水稻节水抗旱栽培和抗倒伏种质的研究与利用奠定基础。

Study on Lodging Resistance and Drought Resistance of Main Rice Varieties （Lines) under Water Saving Cultivation in Heilongjiang Province

Lodging is an important factor that seriously affects rice yield and quality. Through the changes of traits closely related to rice lodging resistance under conventional irrigation and water-saving and drought-resistant cultivation modes, the lodging resistance of main rice varieties （lines) in various accumulative temperature zones in Heilongjiang province were studied. The results showed that the water-saving and drought-resistant treatment reduced the lodging index of some varieties （lines), increased the flexural resistance of the two-section sheath, increased the inter-node dry weight, reduced the inter-section cross-sectional area, and thickened the stem wall. The first accumulated temperate zone varieties Longdao 16 and Longdao 24, the second accumulative temperature varieties Suigeng 4, Suigeng 17, Suigeng 18, Beidao 7, Suigeng 089290, the third accumulative temperature zone varieties Suigeng 15, Longgeng 56, Longgeng 51, Longgeng 58, Longgeng 20, Longjiao 08119, Longfeng 12500, Longgeng 3100 and Longgeng 1424, the fourth accumulated temperate zone varieties Longgeng 24, Longgeng 1525, Longjiao 13S6, the fifth accumulated temperature zone variety Longgeng 4344 have high lodging resistance, comprehensive drought resistance index and relative high measured yield. Through investigation and research, we can understand the lodging resistance of the main varieties （lines) in each accumulative temperate zone, which laid a foundation for the research and utilization of rice water-saving and drought-resistant cultivation and lodging resistance germplasm in Heilongjiang province.