Research on lodging resistance of A1-type and A3-type cytoplasm sweet sorghum（Sorghum bicolor） | A1、A3型细胞质甜高粱品种抗倒性能研究

chinois. 为探讨比较A1和A3两种细胞质甜高粱品种在抗倒性上的异同点,以便有针对性地培育抗倒伏品种,解决生产中的倒伏问题。试验应用5个典型的A1细胞质品种和5个A3细胞质品种为试材,对其自然倒伏率、倒折率,各倒伏影响因子以及抗倒参数进行了比较与分析,同时进行了拉力试验。结果表明：在自然条件下,A3细胞质品种的倒折率和倒伏率均明显低于A1细胞质品种;A3细胞质品种茎秆充实度和茎秆壁厚度显著高于A1细胞质品种;A3细胞质品种较A1细胞质品种在抗弯能力上有较大的优势;用拉力秤将茎秆拉至偏离竖直方向45°、60°和75°时,A3细胞质品种所用的拉力可分别比A1细胞质品种高16.4%、15.6%和18.6%,回复后角度分别低3.70°、3.96°和4.08°。说明A3细胞质品种的抗倒潜力很大,用做生物乙醇的原材料栽培有明显优势,有必要进行进一步研究。

anglais. The purpose of this study was to investigate the similarities and differences of lodging resistance between A1-type and A3-type cytoplasm sweet sorghum.The result may help breed lodging-resistant hybrids and solve the lodging problem in sweet sorghum.Five A3-type and 5 A1-type cytoplasm sweet sorghum hybrids were used for this study and the natural lodging rate,breaking rate,and results of tensile force test were compared and analyzed.We found that the natural lodging rate and breaking rate of A3-type cytoplasm sweet sorghum was significantly lower than that of A1-type cytoplasm sweet sorghum.The stalk enrichment degree and stalk wall thickness of A3-type cytoplasm sweet sorghum was significantly higher than that of A1-type cytoplasm sweet sorghum.A3-type cytoplasm sweet sorghum had a great superiority in anti-bending ability compared with A1-type cytoplasm sweet sorghum.When stalk was pulled to 45°,60° and 75° from vertical direction with spring scale,the used tensile force of A3 cytoplasm sweet sorghum was 16.44% 15.63% and 18.58%,respectively,which was more than that of A1-type cytoplasm sweet sorghum hybrids,and the corresponding retrieved angles were 3.70°,3.96° and 4.08° lower than A1-type cytoplasm sweet sorghum,respectively.We showed that A3-type cytoplasm sweet sorghum hybrids had a great lodging resistance potential and obvious advantages to used for bio-ethanol production.