Study on the Evaluation of Rice Planting Methods in Rice-Crab Ecological Mode
Received date: 2022-09-22
Online published: 2023-01-17
By comprehensively analyzing the data of rice yield, rice quality and river crab yield of the three rice planting methods （1 empty line every 6 lines, 1 empty line every 12 lines and 1 empty line every 18 lines）, we studied the optimal rice planting method suitable for mechanized operation under the rice-crab ecological cultivation mode. The results showed that compared with the rice yield under the common rice-crab breeding mode, the effective panicle number was increased by the marginal effect, which supplemented a part of the loss of rice yield caused by the blank row. At the same time, the protein content of rice is reduced, and the head rice rate and the recapture rate of crabs are increased. Combining the economic benefits of rice and crab, the rice-crab ecological cultivation mode with“1 empty line every 12 lines” had the largest production-to-investment ratio of 2.84, an increase of 13 802 yuan/hm2 compared with the rice monoculture mode, and an increase of 2 952 yuan/hm2 compared with the conventional rice-crab cultivation mode. In summary, the rice-crab ecological cultivation mode with “1 empty line every 12 lines” was the most economical rice planting method for the rice-crab ecological cultivation.
MA Liang, DONG Liqiang, YANG Tiexin, PAN Zhengyan, LI Zhiqiang, SUN Fuyu . Study on the Evaluation of Rice Planting Methods in Rice-Crab Ecological Mode[J]. China Rice, 2023 , 29(1) : 113 -116 . DOI: 10.3969/j.issn.1006-8082.2023.01.019
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