头季稻株营养物质与再生稻生育的关系

以汕优６３为材料，研究了头季稻中后期的营养状况对再生芽（苗）生长、再生稻的生育期及植株性状与经济性状的影响和头季稻后期茎书与再生芽（苗）的糖、Ｎ供求关系以及分析头季稻茎节的糖、Ｎ含量与活芽（苗）率、芽长、芽穗分化率和芽穗分化期等的相关性。指出促成头季稻茎节淀粉和全糖积累的措施均有利于强秆壮芽，争取再生稻多收。

The Relation between the Nutritive Substances of Main Crop Plantsand the Growth of Ratooning Crop in Rice

With the most popular hybrid rice combination Shanyou 63 as the experimental material,therelation between the nutritive substances of the main cropping rice plants and the growth of the ratooning ricewas studied.The results are as follows:(1) the growth of regenerative buds and the growth period,plantcharacters,economical characters of the ratooningrice were affected evidently by the nutrition status of themid- late growth periodof the main cropping rice;(2)the conents of carbohydrate and nitrogen in stemnodes of the late period of the main cropping rice and that of the regenerative buds were highly correlated;(3 ) the survived bud percentage,bud length, panicle differeniation time were correlative to the contents ofcarbohydrate and nitrogen in the stem nodes of the main crop;(4)there existed a significant canonical corre-lation between the stem nodal characters and regenerative bud growth characters. Among the 6 nodal charac-ters analyzed,the most important ones to bud growth were the contentsof starch and total carbohvdrate.