水稻早熟品种分蘖生产力的初步分析——第Ⅲ报 不同施肥条件下各节位分蘖生产力

PRIMARY ANAALYSIS OF PRODUCTIVITY OF TILLERS IN EARLY MATURING RICE CULTIVAR Ⅲ. THE PRODUCTIVITY. OF EVERY KNOT TILLER UNDER DIFFRERNT MANURE CONDITION

为探讨水稻早熟品种分蘖生产力在不同施氮条件下的反应规律,试验设计了大头肥(对照),全生育期平衡施氮、生育中期控制施用氮肥和生育前期加重施氮4个处理。试验结果表明:水稻早熟品种在密植条件下,各种施氮处理都表现出“优势三节位”现象。

To explore the productivity of tillers of early maturing cultivars, especially the responses under diffi rent nitrogen conition, the relationship between early maturing rice cultivars and treatments of nitrogen fertilization was examed Four treatments were given: (A)most of application before transplanting (CK) , (B) balance nitrogen amount during whole developmental stage, (C) control of nitrogen amount during the middle growth stage and(D)addtional amount of nitrogen during the early developmental stage. The result confirmed that in high density of plants, the early maturing rice cultivars all present ' three advantage tillers' under each treatment of the nitrogen application.