Five Chinese milk vetch（Astragalus sinicus） varieties were selected to make a comparison in order to screen effective varieties which could suit for the double-rice cropping system of Hunan Province. The results sho...Five Chinese milk vetch（Astragalus sinicus） varieties were selected to make a comparison in order to screen effective varieties which could suit for the double-rice cropping system of Hunan Province. The results showed that the growth period of Xiangzi 2 is shorter than that of Xiangfei 2, Xiangfei 3 and Yujiangdaye,and is similar to that of Xinyang Chinese milk vetch. The full-bloom stage of Xiangzi 2 is also similar to Xinyang variety and obviously earlier than that of the other three varieties. The fresh grass yield of Xiangzi 2 in full-bloom stage is 23 842.5kg/hm^2, which increases by 39.9% compared with Xinyang variety. Nitrogen content in the fresh grass of Xiangzi 2 is higher than that of the other four varieties. In conclusion, Xiangzi 2 is an extremely early-blossoming and early-maturing Chinese milk vetch variety with moderate fresh grass yield, high nutrient contents, stable characters and wide adaptability. So, Xiangzi 2 is suitable for planting in double-rice cropping region in Hunan Province and other same latitude regions which have similar ecological conditions.展开更多
Chinese milk vetch(Astragalussinicus L.)is an environment-friendly green manure used for rice with low carbon/nitrogen(C/N)ratio and high moisture.To improve the added values of milk vetch,the feasibility of co-compos...Chinese milk vetch(Astragalussinicus L.)is an environment-friendly green manure used for rice with low carbon/nitrogen(C/N)ratio and high moisture.To improve the added values of milk vetch,the feasibility of co-composting of milk vetch with rice straw was evaluated.The probability of using the milk vetch-based compost as a peat substitute in seeding substrate of vegetable was further tested.The changes in physicochemical properties during co-composting of milk vetch and rice straw were evaluated,depending on three treatments:(1)milk vetch alone(MV),(2)co-composting of milk vetch and rice straws with 4:1 ration(w/w)(MV+S)and(3)MV+S with the addition of 3%(w/w)microbial inoculation(MV+S+M).The entire composting durations were 15 d,24 d,and 24 d in MV,MV+S,MV+S+M composts.Compare to MV compost,both the MV+S,MV+S+M composts increased the temperature,pH,organic C,total nitrogen(N),total potassium(K)and the germination index(GI)(over 100)during the cooling/mature phase,and decreased total N loss,and generally,the improvements or reductions were greater in the MV+S+M compost than in the MV+S compost.Additionally,the MV+S+M compost was added at a peat substitute rates of 0%,20%,40%,80%and 100%in a pot experiment to testify the utilization of milk vetch-based compost in substrates.The results showed that the substrate with 40%substitute rate increased the cabbage seeding growth,and that the electrical conductivity was the limiting factor of preventing the substitute rate increase.Another pot experiment demonstrated that the substrate with 40%peat substitute increased the cucumber growth as compared to the substrate without compost.In conclusion,the co-composting milk vetch with rice straw was feasible and quick,and microbial inoculation accelerated the composting process and improved the compost quality.The milk vetch-based composts were nutrient-rich and safe,and thus,can replace part of peat in vegetable seeding substrate.展开更多
研究旨在探讨紫云英较高鲜草翻压量条件下配施不同比例常规用量化肥对单季晚稻养分吸收、养分利用效率和产量的影响。试验设置7个处理:CK(不翻压紫云英和不施化肥),CF(常规用量施肥)及翻压45 t hm-2(GM45)紫云英鲜草配施0、20%、40%、60...研究旨在探讨紫云英较高鲜草翻压量条件下配施不同比例常规用量化肥对单季晚稻养分吸收、养分利用效率和产量的影响。试验设置7个处理:CK(不翻压紫云英和不施化肥),CF(常规用量施肥)及翻压45 t hm-2(GM45)紫云英鲜草配施0、20%、40%、60%和80%常规用量化肥(CF)。在浙江省金华市蒋堂农业科学试验站进行为期2年的田间试验,结果表明,在所有的紫云英翻压配施化肥处理中,虽然水稻N、P、K的总吸收量以GM45+80%CF处理最高,但稻谷P、K养分最高吸收量出现在GM45+40%CF处理中,水稻养分内部利用效率随化肥配施量的增加而降低;水稻的N、P和K的农学利用效率和稻谷产量均以GM45+40%CF处理最高。从提高肥料利用率和降低环境风险的角度出发,紫云英鲜草异地还田量为45 t hm-2时,以配施N 80.6 kg hm-2、P2O521.5 kg hm-2和K2O 43.3 kg hm-2为宜。与CK处理相比,CF和紫云英鲜草翻压配施化肥处理的稻谷产量分别提高13.7%和8.5%～17.4%。在紫云英—单季晚稻耕作制中,紫云英异地还田量45 t hm-2不会使单季晚稻苗期产生僵苗现象。展开更多
基金Supported by the Project of Agricultural Science and Technology Achievements Transformation Funds(2014GB2D200212)Agro-scientific Research Programs in Public Interest(201103005)+2 种基金National Germplasm Resource Platform of Green Manure(2012-019)Conservation and Utilization Project of Crop Germplasm(NB2013-2130135-34)Funding Project of International Plant Nutrition Institute(IPNI)(Hunan-16)~~
文摘Five Chinese milk vetch（Astragalus sinicus） varieties were selected to make a comparison in order to screen effective varieties which could suit for the double-rice cropping system of Hunan Province. The results showed that the growth period of Xiangzi 2 is shorter than that of Xiangfei 2, Xiangfei 3 and Yujiangdaye,and is similar to that of Xinyang Chinese milk vetch. The full-bloom stage of Xiangzi 2 is also similar to Xinyang variety and obviously earlier than that of the other three varieties. The fresh grass yield of Xiangzi 2 in full-bloom stage is 23 842.5kg/hm^2, which increases by 39.9% compared with Xinyang variety. Nitrogen content in the fresh grass of Xiangzi 2 is higher than that of the other four varieties. In conclusion, Xiangzi 2 is an extremely early-blossoming and early-maturing Chinese milk vetch variety with moderate fresh grass yield, high nutrient contents, stable characters and wide adaptability. So, Xiangzi 2 is suitable for planting in double-rice cropping region in Hunan Province and other same latitude regions which have similar ecological conditions.
基金This work was supported by the National Natural Science Foundation of China(Grant No.31870501)Scientific and Technological Achievements Cultivation Project of Hubei Academy of Agricultural Sciences(Grant No.2017CGPY01)the Open Project of Key Laboratory of Fertilization from Agricultural Wastes(Grant No.KLFAW201705).
文摘Chinese milk vetch(Astragalussinicus L.)is an environment-friendly green manure used for rice with low carbon/nitrogen(C/N)ratio and high moisture.To improve the added values of milk vetch,the feasibility of co-composting of milk vetch with rice straw was evaluated.The probability of using the milk vetch-based compost as a peat substitute in seeding substrate of vegetable was further tested.The changes in physicochemical properties during co-composting of milk vetch and rice straw were evaluated,depending on three treatments:(1)milk vetch alone(MV),(2)co-composting of milk vetch and rice straws with 4:1 ration(w/w)(MV+S)and(3)MV+S with the addition of 3%(w/w)microbial inoculation(MV+S+M).The entire composting durations were 15 d,24 d,and 24 d in MV,MV+S,MV+S+M composts.Compare to MV compost,both the MV+S,MV+S+M composts increased the temperature,pH,organic C,total nitrogen(N),total potassium(K)and the germination index(GI)(over 100)during the cooling/mature phase,and decreased total N loss,and generally,the improvements or reductions were greater in the MV+S+M compost than in the MV+S compost.Additionally,the MV+S+M compost was added at a peat substitute rates of 0%,20%,40%,80%and 100%in a pot experiment to testify the utilization of milk vetch-based compost in substrates.The results showed that the substrate with 40%substitute rate increased the cabbage seeding growth,and that the electrical conductivity was the limiting factor of preventing the substitute rate increase.Another pot experiment demonstrated that the substrate with 40%peat substitute increased the cucumber growth as compared to the substrate without compost.In conclusion,the co-composting milk vetch with rice straw was feasible and quick,and microbial inoculation accelerated the composting process and improved the compost quality.The milk vetch-based composts were nutrient-rich and safe,and thus,can replace part of peat in vegetable seeding substrate.
文摘研究旨在探讨紫云英较高鲜草翻压量条件下配施不同比例常规用量化肥对单季晚稻养分吸收、养分利用效率和产量的影响。试验设置7个处理:CK(不翻压紫云英和不施化肥),CF(常规用量施肥)及翻压45 t hm-2(GM45)紫云英鲜草配施0、20%、40%、60%和80%常规用量化肥(CF)。在浙江省金华市蒋堂农业科学试验站进行为期2年的田间试验,结果表明,在所有的紫云英翻压配施化肥处理中,虽然水稻N、P、K的总吸收量以GM45+80%CF处理最高,但稻谷P、K养分最高吸收量出现在GM45+40%CF处理中,水稻养分内部利用效率随化肥配施量的增加而降低;水稻的N、P和K的农学利用效率和稻谷产量均以GM45+40%CF处理最高。从提高肥料利用率和降低环境风险的角度出发,紫云英鲜草异地还田量为45 t hm-2时,以配施N 80.6 kg hm-2、P2O521.5 kg hm-2和K2O 43.3 kg hm-2为宜。与CK处理相比,CF和紫云英鲜草翻压配施化肥处理的稻谷产量分别提高13.7%和8.5%～17.4%。在紫云英—单季晚稻耕作制中,紫云英异地还田量45 t hm-2不会使单季晚稻苗期产生僵苗现象。
