[Objective] The aim was to learn the soil nutrient status of the main rapeseed planting areas in Linxiang County,Yunnan Province,and propose full production potential of soil and fertilizer recommendations,thereby pro...[Objective] The aim was to learn the soil nutrient status of the main rapeseed planting areas in Linxiang County,Yunnan Province,and propose full production potential of soil and fertilizer recommendations,thereby promoting local rapeseed production and income.[Method] The soil samples collected in field and tested in laboratory,with amount of fertilizer needed by rapeseed investigation were combined to calculate the formulated fertilization.[Result] Most of the soil organic matter and nutrient content of NPK were at the middle or higher level in the main rapeseed planting areas in Linxiang County.However,more than half of the soils were acidic or strongly acidic,and the soil p H maintained below 5.5.The shortage soil boron was more serious,the average content and nearly 60% of the sample of soil available boron were less than 0.5 mg/kg.[Conclusion] The formulated fertilization recommendations were identified as follows.To achieve the goal of 3 750 kg/hm^2240,150 and 75 kg/ha,if the application amount of manure was 15 000 kg/h,the total fertilizer N,P2O5,K2 O amount applied were separately 300,195 and 195 kg/hm^2.The chemical fertilizer N,P2O5,K2 O amount applied should be respectively 240,150 and 75 kg/hm^2,if the application amount of manure was 15 000 kg/hm^2.The nitrogen species of urea（containing N 46%）,causing weakest effect on soil acidification,was selected and applied about with 525 kg/hm^2.The alkaline calcium magnesium phosphate（P2O520%）,alternating superphosphate,was applied with about 750 kg/hm^2.Sulfuric acid potassium（K2O 50%） was applied with about 150 kg/hm^2.About 7.5kg/hm^2 borax was applied into soil as basal fertilizer,while spraying 7.5 kg/hm^2 fluid boron at the Bolting stag.展开更多
基金The National Key Technology R&D Program(2012BAD40B02)~~
文摘[Objective] The aim was to learn the soil nutrient status of the main rapeseed planting areas in Linxiang County,Yunnan Province,and propose full production potential of soil and fertilizer recommendations,thereby promoting local rapeseed production and income.[Method] The soil samples collected in field and tested in laboratory,with amount of fertilizer needed by rapeseed investigation were combined to calculate the formulated fertilization.[Result] Most of the soil organic matter and nutrient content of NPK were at the middle or higher level in the main rapeseed planting areas in Linxiang County.However,more than half of the soils were acidic or strongly acidic,and the soil p H maintained below 5.5.The shortage soil boron was more serious,the average content and nearly 60% of the sample of soil available boron were less than 0.5 mg/kg.[Conclusion] The formulated fertilization recommendations were identified as follows.To achieve the goal of 3 750 kg/hm^2240,150 and 75 kg/ha,if the application amount of manure was 15 000 kg/h,the total fertilizer N,P2O5,K2 O amount applied were separately 300,195 and 195 kg/hm^2.The chemical fertilizer N,P2O5,K2 O amount applied should be respectively 240,150 and 75 kg/hm^2,if the application amount of manure was 15 000 kg/hm^2.The nitrogen species of urea（containing N 46%）,causing weakest effect on soil acidification,was selected and applied about with 525 kg/hm^2.The alkaline calcium magnesium phosphate（P2O520%）,alternating superphosphate,was applied with about 750 kg/hm^2.Sulfuric acid potassium（K2O 50%） was applied with about 150 kg/hm^2.About 7.5kg/hm^2 borax was applied into soil as basal fertilizer,while spraying 7.5 kg/hm^2 fluid boron at the Bolting stag.
