[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
One of the most important functions of soils is to regulate rainwater and mitigate flooding and associated damages; this function can be estimated by the rainwater regulation ratio （η）, i.e., percent of regulated r...One of the most important functions of soils is to regulate rainwater and mitigate flooding and associated damages; this function can be estimated by the rainwater regulation ratio （η）, i.e., percent of regulated rainwater. Fifteen experimental plots were set up on the hills in Yingtan of Jiangxi Province, southern China. These plots were under three land use patterns, cultivated cropland, noncultivated land, and orchard interplanted with cash crops. With aid of an artificial rainfall simulator and Guelph method, rainfall, runoff, soil infiltration, and so on were measured in situ. Results showed that the orchard interplanted with cash crops was more effective in regulating rainwater than the other two land use patterns. When the maximum infiltration intensity was three times higher than the observed mean,η was higher than 70% for all plots. 77 was related to land use, slope gradient, and soil properties such as soil infiltration, organic carbon, bulk density, and texture. There is still more room to improve capacity of rainwater drainage （underground percolation） than that of rainwater storage in soils. Therefore, enhancing soil permeability is vital to improve the rainwater regulation efficiency in soils.展开更多
Aiken base silicon,advanced silicon,activated carbon,desulphurization gypsum,ferric phosphate,humic acid,aluminum dihydrogen phosphate etc.were used as raw meterials to conduct the compound development of salt-alkali ...Aiken base silicon,advanced silicon,activated carbon,desulphurization gypsum,ferric phosphate,humic acid,aluminum dihydrogen phosphate etc.were used as raw meterials to conduct the compound development of salt-alkali soil amendents,and the salt-tolerant rice"Chaoyouqianhao"was used as the test variety to verify the effect of increasing yield under simulated salt stress environment.The results showed that at the tillering stage,the growth indexes of rice plant in the treatment with soil amendements were better than that in the treatment without soil amendments(CK2).Of which,T5 and T6 had the best effect,and the dry weight of rice plant increased by 40.99%and 70.06%,respectively,compared to the CK2.At the maturity stage,T5,T6 and T7 had a better effect on the increase of rice yield.Of which,T5 had the highest yield,up to 6533.32 kg/hm^(2),which increased by 29.97%compared to the CK2.Focused on the soil amendments formulation in the T5 and T6,the two formulations all contained ferric phosphate,humic acid,calcium magnesium phosphate fertilizer,indicating that these substances played an important role in saline-alkali soil improvement.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.
基金the National Key Basic Research Support Foundation of China (No.2007CB407206) the National Natural Science Foundation of China (No.40471081).
文摘One of the most important functions of soils is to regulate rainwater and mitigate flooding and associated damages; this function can be estimated by the rainwater regulation ratio （η）, i.e., percent of regulated rainwater. Fifteen experimental plots were set up on the hills in Yingtan of Jiangxi Province, southern China. These plots were under three land use patterns, cultivated cropland, noncultivated land, and orchard interplanted with cash crops. With aid of an artificial rainfall simulator and Guelph method, rainfall, runoff, soil infiltration, and so on were measured in situ. Results showed that the orchard interplanted with cash crops was more effective in regulating rainwater than the other two land use patterns. When the maximum infiltration intensity was three times higher than the observed mean,η was higher than 70% for all plots. 77 was related to land use, slope gradient, and soil properties such as soil infiltration, organic carbon, bulk density, and texture. There is still more room to improve capacity of rainwater drainage （underground percolation） than that of rainwater storage in soils. Therefore, enhancing soil permeability is vital to improve the rainwater regulation efficiency in soils.
文摘Aiken base silicon,advanced silicon,activated carbon,desulphurization gypsum,ferric phosphate,humic acid,aluminum dihydrogen phosphate etc.were used as raw meterials to conduct the compound development of salt-alkali soil amendents,and the salt-tolerant rice"Chaoyouqianhao"was used as the test variety to verify the effect of increasing yield under simulated salt stress environment.The results showed that at the tillering stage,the growth indexes of rice plant in the treatment with soil amendements were better than that in the treatment without soil amendments(CK2).Of which,T5 and T6 had the best effect,and the dry weight of rice plant increased by 40.99%and 70.06%,respectively,compared to the CK2.At the maturity stage,T5,T6 and T7 had a better effect on the increase of rice yield.Of which,T5 had the highest yield,up to 6533.32 kg/hm^(2),which increased by 29.97%compared to the CK2.Focused on the soil amendments formulation in the T5 and T6,the two formulations all contained ferric phosphate,humic acid,calcium magnesium phosphate fertilizer,indicating that these substances played an important role in saline-alkali soil improvement.
