膜下滴灌栽培粳稻品种产量构成与穗部特征研究

为探讨膜下滴灌栽培模式下的粳稻产量构成及其穗部特征,以12个水稻品种(A1~A12)为材料,比较分析了其产量及其构成因素、茎蘖组成及其成穗率、穗部构成特征.结果表明:在膜下滴灌栽培条件下,不同品种的产量及其构成因素平均值以A6最高,膜下滴灌水稻主要依靠主茎和一级分蘖成穗,且主茎和一级分蘖的贡献率占97%以上,群体数量的上升较平稳,成穗率中等;膜下滴灌水稻可以依靠二次枝梗数来增加穗粒数,二次枝梗对穗粒数的贡献率在57%以上.膜下滴灌水稻栽培应选用着粒密度较大、紧实的大穗型品种.

Study on Yield Composition and Panicle Characteristics of Japonica Rice Varieties under Film Drip Irrigation Planting Technology

In order to study the yield components and panicle characteristics of japonica rice under drip irrigation under mulch,12 rice varieties(A1-A12)were used as materials to compare and analyze their yield and components,tiller composition,panicle formation rate and panicle composition.The results showed that under the condition of drip irrigation under mulch,the average yield and its components of different varieties were highest in A6,and drip irrigation under mulch mainly relied on the main stem and first tiller to form panicles,and the contribution rate of main stem and first tiller accounted for more than 97%,the number of population increased steadily,and the panicle-forming rate of drip irrigation under mulch was medium.The number of grains per panicle was increased by the number of secondary branches.The contribution rate of secondary branches to the number of grains per panicle was more than 57%.Large panicle rice varieties with high grain density and compactness should be selected for drip irrigation under mulch.