To improve the soil fertility and increase farmers’income in the ricecultivating area with red soil in Southern Hunan,a 6-year fixed-location experiment was carried out with three economic green manure cropping patte...To improve the soil fertility and increase farmers’income in the ricecultivating area with red soil in Southern Hunan,a 6-year fixed-location experiment was carried out with three economic green manure cropping patterns of rice-radish(RR),rice-broad bean(RB),and rice-pea(RP),and rice-winter leisure was taken as the control(CK).The rice yield,soil physicochemical properties,and comprehensive economic benefits were compared between different patterns.The results showed that the three economic green manure cropping patterns all increased the rice yield.Continues economic green manure cropping significantly increased the grain yield and aboveground biomass of rice.The three green manure cropping patterns did not cause significant changes in soil pH value,organic matter,total nitrogen,available nitrogen,or available potassium,while they increased the total potassium compared with CK.All the three patterns increased the economic benefit,and the rice-broad bean pattern had the highest economic benefit.Considering both soil fertility and economic benefits,rice-broad bean was recommended as the planting pattern in the paddy fields of red soil in Southern Hunan.展开更多
[Objective] This study aimed at exploring the utilization rate of water of the new water-saving rice variety ＂Luhan No.1＂ and providing references and basis for the further demonstration and extension.[Method] Water...[Objective] This study aimed at exploring the utilization rate of water of the new water-saving rice variety ＂Luhan No.1＂ and providing references and basis for the further demonstration and extension.[Method] Water-saving rice variety ＂Luhan No.1＂ and original receptor ＂6527＂ were used for dry processing without aquifer,and rice under regular irrigation conditions was used as the control.[Result] Under conditions which had economized on 67.4% of water compared with the regular irrigation,decreasing rates of 1 000-seed weight,seed setting rate,plant height and effective panicles of ＂Luhan No.1＂ were relatively small and had not achieved a significant level,while the decreasing rates of production of the region,total grains per panicle,theoretical production and filled grains per panicle of the original receptor ＂6527＂ were all over 25% and had attained very significant levels（P0.01）.[Conclusion] ＂Luhan No.1＂ had shown stable production,energy conservation,reducing environmental pollution and other advantages under water-conservating cultivation conditions.展开更多
文摘To improve the soil fertility and increase farmers’income in the ricecultivating area with red soil in Southern Hunan,a 6-year fixed-location experiment was carried out with three economic green manure cropping patterns of rice-radish(RR),rice-broad bean(RB),and rice-pea(RP),and rice-winter leisure was taken as the control(CK).The rice yield,soil physicochemical properties,and comprehensive economic benefits were compared between different patterns.The results showed that the three economic green manure cropping patterns all increased the rice yield.Continues economic green manure cropping significantly increased the grain yield and aboveground biomass of rice.The three green manure cropping patterns did not cause significant changes in soil pH value,organic matter,total nitrogen,available nitrogen,or available potassium,while they increased the total potassium compared with CK.All the three patterns increased the economic benefit,and the rice-broad bean pattern had the highest economic benefit.Considering both soil fertility and economic benefits,rice-broad bean was recommended as the planting pattern in the paddy fields of red soil in Southern Hunan.
基金Supported by National863Green Super Rice Project"Water-saving and Drought-resistant Rice Germplasm Innovation"(2010AA101803)Anhui Province Foreign Expert Bureau Agricultural Introduction and Promotion Project"Demonstration and Extension of National Authorized Dry Rice Variety'Luhan No.1'"(Y20083400015)~~
文摘[Objective] This study aimed at exploring the utilization rate of water of the new water-saving rice variety ＂Luhan No.1＂ and providing references and basis for the further demonstration and extension.[Method] Water-saving rice variety ＂Luhan No.1＂ and original receptor ＂6527＂ were used for dry processing without aquifer,and rice under regular irrigation conditions was used as the control.[Result] Under conditions which had economized on 67.4% of water compared with the regular irrigation,decreasing rates of 1 000-seed weight,seed setting rate,plant height and effective panicles of ＂Luhan No.1＂ were relatively small and had not achieved a significant level,while the decreasing rates of production of the region,total grains per panicle,theoretical production and filled grains per panicle of the original receptor ＂6527＂ were all over 25% and had attained very significant levels（P0.01）.[Conclusion] ＂Luhan No.1＂ had shown stable production,energy conservation,reducing environmental pollution and other advantages under water-conservating cultivation conditions.
