Journal of Hunan Ecological Science

【Objective】It is to investigate the effects of different cultivation patterns on annual yield and and aboveground dry matter quality of ratooning rice. 【Method】Using Yongyou 4949 and Jingliangy- ou 1468 as test varieties, three cultivation models were carried out: local production mode (150 kg / hm2 of nitrogen application, 7 ∶3 nitrogen-fertiliser basal chasing ratio, planting density of 25 root and stem/ m2), high-yield and high-efficiency mode (120 kg / hm2 of nitrogen application, 5 ∶5 nitrogen-fertiliser basal chasing ratio, planting density of 30 root and stem/ m2), and the re-high-yield and high-efficiency mode (150 kg / hm2 of nitrogen application, 4 ∶6 nitrogen-fertiliser basal chasing ratio, planting density of 32 root and stem/ m2, 2. 25 t/ hm2 of organic fertiliser), and the yields and dry matter qualities of ra- toon rice were determined in different cultivation modes. 【Result】The main and ratoon rice yields of the re-high-yield and high-efficiency model were significantly higher than those of the local production mode, and the main crop yield of Yongyou 4949 in the two years was significantly increased by 39. 1% and 40. 7% , and the ratoon crop yield by 60. 5% and 33. 3% , respectively, compared with that of the local production mode. The main crop yield of Jingliangyou 1468 increased significantly by 52. 5% and 52. 3% , and the ratoon crop yield increased significantly by 82. 4% and 25. 6% , respectively, compared with the local production mode. In terms of yield components, the main crop and ratoon crop yields in- creased with the increase in the number of spikes per unit area. In terms of dry matter mass, the highest dry matter accumulation at maturity was observed in ratoon rice under the re-high-yield and high- efficiency mode. 【Conclusion】The results showed that the re-high-yield and high-efficiency mode a- chieved the purpose of increasing the yield of ratoon rice. It can provide theoretical basis for high-yield and high-efficiency cultivation technology of ratoon rice in Hunan Province.

ratoon rice; cultivation pattern; yield; dry matter quality