Technology Integration and Demonstration of High Standard,Technology,Yield,and Quality in Grain Production in Changsha
Following the test and demonstration of high standard,technology,yield,and quality in grain production in 2022,Changsha carried out the selection of double cropping rice cultivars and demonstrated the integration of technologies including improving soil fertility,laser-assisted field leveling,planting different rice cultivars according to land conditions,crop matching,mechanical dense planting,variable fertilization,prioritizing biocontrol,and gradient pest control in 2023.The results showed that the suitable combinations of double cropping rice cultivars were'Xinrongyou 123'+'Longjingyou 1212','Zhong'an 7'+'Taiyou 398','Lingliangyou 268'+'Taiyou 398','Lingliangyou 268'(Liuyang)+'Y Liangyou 911','Xiangzaoxian 32'(Ningxiang)+'Y Liangyou 911'.The annual average yields of demonstration areas of 1 000 mu(1 mu≈667 m2),10 000 mu,and 100 000 mu reached 19 478.3,18 066.4,and 15 077.4 kg/hm2,respectively,which represented the increases of 51.8%,40.8%,and 17.5%,respectively,compared with that in the non-demonstration area.The annual net incomes of the demonstration areas of 1 000 mu and 10 000 mu were 20 630.68 yuan/hm2 and 19 437.78 yuan/hm2,respectively,representing the increases of 87.7% and 76.8%,respectively,compared with that of the non-demonstration area.
grain productioncultivar selectiontechnologies of high standard,technology,yield,and qualitydemonstrationdouble cropping rice
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