Effects of the Application of Bud-promoting Fertilizers in the First Season of Ratooning Rice on the Growth and Development of Axillary Buds at Different Nodes and the Carbon and Nitrogen Content
Hybrid rice varieties Luyou 1831 and Yongyou 1540 were used as test materials,and four different treatments of bud promoting fertilizer were set up(N0,no nitrogen application;N1,pure N 75.00 kg/hm2;N2,pure N 84.40 kg/hm2;N3,pure N 93.75 kg/hm2),in order to explore the effects of bud-promoting fertilizer application on the germination and growth of axillary buds at different nodes in the first season of ratooning rice.The survival rate of axillary buds at different node locations,bud length,non-structural carbohydrate content in stem nodes and total nitrogen content of stem nodes in the first season of ratooning rice were measured under different application rates of bud-promoting fertilizers.The results showed that the survival rate of axillary buds and bud length were positively correlated with the application rate of bud-promoting fertilizers.The application of bud-promoting fertilizers significantly increased the survival rate of axillary buds in regenerable rice,the N3 treatment increased the axillary bud survival rate by 27.34％(Yongyou 1540)and 36.51％(Luyou 1831)compared to the N0 treatment.Axillary buds at different nodes responded differently to germination-promoting fertilizers.In the N3 treatment,the survival rates of Luyou 1831 axillary buds at the second,third,and fourth nodes increased by 74.36％,29.35％and 22.33％compared to the N0 treatment,respectively.The survival rates of Yongyou 1540 axillary buds at the second,third,and fourth nodes increased by 24.25％,22.33％and 40.49％compared to the N0 treatment,respectively.The survival rate of axillary buds at higher nodes was higher than that at lower nodes under the same application rate of bud-promoting fertilizers.The survival rate of axillary buds was positively correlated with the soluble sugar content in the buds,and negatively correlated with the starch content in the axillary buds at the third and fourth nodes.In conclusion,the survival rate of axillary buds at different nodes is related to the soluble sugar content in the buds,with the highest requirement for bud-promoting fertilizers needed to maintain the survival of axillary buds at the fourth node.When choosing to harvest with low stubble,the application rate of bud-promoting fertilizers can be reduced appropriately.
国家科技期刊平台
NSTL
万方数据
维普
