冬水田杂交中稻栽秧密度与方式互作对头季稻及再生稻生长的影响

Effect of Cultural Density and Model on Main Crop and Ratooning Rice of Mid-season Hybrid Rice in Winter Paddy Field

以杂交中稻川江优527为材料,在冬水田条件下研究了6个栽秧密度与等行距和三角形2种栽秧方式对杂交中稻及其再生稻的影响。结果表明,在相同栽秧密度条件下,等行距比三角形显著增产,但增产程度与栽秧密度呈显著负相关关系。头季产量、再生稻产量及两季总产均以中等密度(15.16万穴/hm2)的等行距栽培为佳。等行距增产的原因在于,等行距的秧苗分布较均匀,致使穴间光照分布合理、促进了秧苗个体生长。

The experiment was conducted with Chuan-Jiang You 527,a mid-season rice combinations grown under the condition of 6 cultural densities and 2 cultural models of equal-distance between rows（EDBR） and triangle.By using variance,correlation and path analysis,the results indicated that the grain yield of EDBR were highly significanty higher than ones of triangle in equal cultural density,and there were significantly negative correlations between the amount of grain yield increased and cultural densities.The best high yield cultural treatment was density about 15.16×104hill/ hm2 with EDBR for main crop,rationing rice and total yield.The reason of EDBR helping to increase grain yield was that the seedlings of EDBR were fairly well-distributed,so that sun light was well-distributed in field,and the single seedling strongly grew.