Analysis of Dry MatterAccumulation and Lodging Resistance of Machine-Transplanted Indica Rice
1st author: liguiy980200@163.com
Received date: 2021-06-18
Online published: 2021-09-20
In order to explore the relationship between dry matter accumulation, lodging resistance and yield of machine-transplanted indica rice varieties, the dry matter accumulation, lodging index, yield and other agronomic characteristics of 19 machine-transplanted indica rice varieties planted in a large area in Yunnan Province were investigated and analyzed. The results showed that the average yield of 19 machine-transplanted indica rice was 11 457.46 kg/hm2; the dry matter accumulation from tillering to jointing, jointing to heading, and heading to maturity accounted for 23.14%, 30.22%, and 83.71% of the yield, respectively; the export percentage and translocation percentage of stem-sheaths were 29.68% and 22.38%, respectively. Lodging risk from high to small is N5 internode>N4 internode>N3 internode. There was no significant correlation between lodging index of N3 internode, N4 internode and N5 internode. The correlation coefficient between dry matter accumulation after heading and yield was the highest, at 0.92, reaching a very significant level. The results could provide a theoretical basis for the selection of high-yield varieties of machine-transplanted indica rice.
Key words： machine-transplanted; rice; dry matter accumulation; lodging resistance; yield
Guiyong LI, Meifeng SHI, Qinglan HE, Haiping ZHU, Qiongmei XIA, Ruiping LONG, Anfeng DENG, Congdang YANG . Analysis of Dry MatterAccumulation and Lodging Resistance of Machine-Transplanted Indica Rice[J]. China Rice, 2021 , 27(5) : 97 -101 . DOI: 10.3969/j.issn.1006-8082.2021.05.021
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