栽插行距对水稻产量结构和叶面积组成的影响

EFFECT OF PlANTING ROW SPACING ON RICE YIELD STRUCTURE AND COMPOSITION OF LEAF AREA

试验以中粳稻武育粳３号、盐粳４号和杂交中籼稻汕优６３为材料。研究栽插行距及生育中期疏蘖措施对产量结构及其叶面积组成的影响。结果表明：行距扩大，抽穗期群体叶面积适宜，有效、高效叶面积率高，孕穗期到成熟期叶面积衰减率小，保持较高的光合生产力，成穗率高，穗粒数协调，产量提高。本试验条件下，中粳稻盐粳４号、武育粳３号适宜行株距为（２６．７～３０）ｃｍ×１０ｃｍ，汕优６３适宜行株距为（３０～３３）ｃｍ×１０ｃｍ。

Taking the middle round grain Wuyugeng 3, Yangeng 4 and the middle long grain Shanyou 63 as experimental materials We studied the effect of different planging row spacing and artificial tiller removing in the middle growth period on yield structure and composition of leaf area Results were as follows: With the planting row spacing enlarged, the population′s total leaf area is suitable, the ratio of effective and high effective leaf area are both higher, and the declining rate of the leaf is low, while the productivity of dry matter keeps at high level from booting to ripening Then high percentage of ear bearing tiller and reasonable numbers of ear grain are gained, so the yield is high On the condition of this experiment, the suitable planting row spacing of the Yangeng 4 and Wuyugeng 3 is (26￣30) cm×10 cm, as to Shanyou 63, (30￣33) cm×10 cm is suitable