Li Yan

Sichuan University of Science and Engineering

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Guan Lian-zhu

Shenyang Agricultural University

Shan Wan

Soochow University

Zhihua Li

Jiangsu University

Lili Wang

Chinese Academy of Sciences

Xin Shurong

Shandong Academy of Agricultural Sciences

LI Song-xing

Wenhua Xiang

Central South University of Forestry and Technology

Rao XiuTing

Haiyue Wang

Xidian University

Wenzhe Li

Shenzhen Institutes of Advanced Technology

Cooperative Institutions

Sichuan University of Science and Engineering

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Ministry of Agriculture and Rural Affairs

Shenyang Agricultural University

Sichuan University

Huazhong University of Science and Technology

Central South University

Northeast Agricultural University

Institute of Applied Ecology

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Effect of Combined Application of Organic and Inorganic Fertilizers on Phosphorus Leaching in Vegetable Soils

Soils (2007)

Li Yan

An indoor simulating experiment was conducted with repacked soil columns to study the effect of the combined application of organic and inorganic fertilizers on phosphorus leaching in vegetable soils. Results showed that increasing organic fertilizer application obviously increased the content of soil organic P, thus caused phosphorus leaching. At the same applied amount of phosphate fertilizer, the more proportion of organic phosphate fertilizer, the higher concentration and accumulative leaching amount of TP, DTP and DOP in soil columns leacheate. The results suggested that soil organic P could be used as an index to evaluate the effect of soil-phosphorus-loss risk in water environment.

Organic fertilizer

Phosphate fertilizer

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Citations (2)

Studies on soil nutrient accumulation in protected vegetable land and nitrate pollution of agricultural products in Shouguang city.

Guangdong nongye kexue (2013)

Xinhao Gao Ping Liu Zhaohui Liu Li Yan Lihua Jiang

Seven typical protected vegetable planting areas of Shouguang city were selected as the studied areas,the chemical and physical properties of soil and groundwater as well as the nitrogen pollution of agricultural products in these areas were investigated and evaluated.The results showed that cultivated soil acidification in these vegetable planting areas was not found,and their average pH-value was 8.10.The average EC value of the cultivated soil was 0.339 mS/cm,and it showed a significantly linear correlation with the nitrate nitrogen content in the soil(R2 = 0.7429).The average organic matter content in topsoil soil reached 31.9 g/kg,and 57% of the soil samples contained above 30 g/kg organic matter.The nitrate nitrogen accumulation status in 0 ～ 150 cm soil layer showed a nearScurve,and nitrate nitrogen in 90 ～ 150 cm soil layer had great deal of accumulation.While ammoniac nitrogen accumulation in 0 ～ 150 cm soil layer showed a typicalScurve,and ammoniac nitrogen accumulated mainly in 90 ～ 120 cm soil layer.The accumulation curves of available phosphorus and available potassium were similar to a adverse Lcurve,and their contents obviously decreased with the increase of soil depth.The accumulation amount of available potassium in 90 ～ 150 cm soil layer was higher than that of available phosphorus.The average nitrate content in the studied 21 agricultural product samples was 109.34 mg/kg,and the highest nitrate content was 176.09 mg/kg.So the obvious nitrate pollution of agricultural product samples was not found.

Topsoil

Soil test

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Effect of land use on soil microbial biomass phosphorus in mid-subtropical zone.

Journal of Northwest A&F University (2016)

Shenglan Li Xi Fang Li Yan Wenhua Xiang Shiji Zhang

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Effects of digestate application depth on soil nitrogen volatilization and vertical distribution

International journal of agricultural and biological engineering (2016)

Lili Wang Wenzhe Li Zhongjiang Wang Zhi-Wu Wang Sui Chao

Abstract: This study investigated the effect of the digestate application depth on soil nitrogen volatilization and vertical distribution in black loam soil and sandy loam column. The contents of soil moisture, TKN (total Kjeldahl nitrogen), ammonium nitrogen, nitrate nitrogen, and the extent of ammonia volatilization were tested by applying digestate at depths of 0 cm, 2 cm, 6 cm, 10 cm, 15 cm and 20 cm, respectively. The experimental results showed that ammonia volatilization mainly occurred in the first 10 days and reduced significantly when the application depth was deeper than 10 cm. At the same application depth, compared with the black loam, the nitrogen loss in sandy loam through ammonia volatilization was less, and the penetration depth of nitrate nitrogen and ammonium nitrogen were all deeper. In the same soil, nitrate nitrogen penetrated deeper than ammonium nitrogen at all application depths. Keywords: digestate, application depth, ammonia volatilization, black loam, sandy loam, soil nitrogen distribution DOI: 10.3965/j.ijabe.20160905.2396 Citation: Wang L L, Li W Z, Wang Z J, Wang Z W, Sui C, Li Y. Effects of digestate application depth on soil nitrogen volatilization and vertical distribution. Int J Agric & Biol Eng, 2016; 9(5): 101－107.

Digestate

Volatilisation

10.25165/ijabe.v9i5.2396

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Citations (9)

Distribution and correlation analysis of topsoil organic matter,nitrogen and phosphorus in mining subsidence area

Environmental Pollution & Control (2015)

Li Yan

Topsoil samples(0-20cm)were collected from Huainan mining subsidence area,the distribution characteristics and correlation analysis of pH,organic matter,total nitrogen,available nitrogen,total phosphorus,available phosphorus and C/N in subsidence area and reclamation area were researched.Results showed that mean contents of the soil pH,organic matter,total nitrogen,available nitrogen,total phosphorus,available phosphorus and C/N were7.5,16.8g/kg,2.97g/kg,43.7mg/kg,76.6mg/kg,13.0mg/kg,3.4.The pH of coal mining subsidence area was neutral,the reclamation area was alkaliscence.Soil fertility of study area was in the low level,which indicated that soil nutrient elements were easy to leach,supplement to the soil fertility should be considered.Filling reclamation with gangue may disturb the distribution of soil effective phosphorus,but the content of phosphorus and C/N could be promoted by a certain degree of reclamation.The Pearson test showed that soil organic matter with total nitrogen and soil matter with total phosphorus were significantly correlated(P0.01).The distribution of topsoil organic matter was synchronous with effective nitrogen.By using the linear regression equation,the content of total nitrogen and phosphorus could be estimated by the content of organic matter.

Topsoil

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Effects of bio-char on soil microbes in herbicide residual soils.

Nongye ziyuan yu huanjing xuebao (2015)

Genlin Wang Yumei Li Liu Zheng-yu Song BaiQuan Li Yan

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Effect of Fertilization on Winter Wheat Yield in the Oasis Farmland

Li Yan

To clarify how to enhance the oasis farmland soil fertility in virtue of reasonable combined application of organic fertilizer and chemical fertilizer,the nutrient and organic matter of grey desert soil associated with winter wheat were analyzed and the effects of different proportions of nitrogen,phosphorus,potassium fertilizers and organic fertilizer on winter wheat yield were discussed in this paper.It was showed that: the potassium element of grey desert soil is rich enough to meet the need for the normal growth of winter wheat.The extremely positive correlations were observed between organic matters,nitrogen and winter wheat yield,respectively,so winter wheat yield increases when augment their contents to grey desert soil.Although single application of chemical fertilizer could enhance winter wheat yields,its long-term effect is weak.In conclusion,combined application of inorganic fertilizer and organic fertilizer is necessary to enhance the soil fertility and stability the winter wheat yield.

Winter wheat

Organic fertilizer

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Effects of Different Phosphate Fertilizers Application on Phosphorus Leaching in Vegetable Soils

Journal of Zhangzhou Normal University (2009)

Li Yan

An indoor simulating experiment was conducted with repacked soil columns for studying the effect of different phosphate fertilizers application on phosphorus leaching in vegetable soils.Results showed that the concentration and total amount of TP and DTP in the leachates of soil columns fertilized calcium super-phosphate(SSP),calcium magnesium phosphate(CMP) or ammonium phosphate(AP) in the same amount of phosphorus were in an order: APSSPCMP.The effects of different phosphorus fertilizers application on increasing the content of Olsen-P in every layers of soil was in the following order: APSSPCMP.It was suggested that calcium magnesium phosphate should be used in acidic vegetable soils to reduce phosphorus leaching,improve soil pH and provide calcium,magnesium nutrition which vegetable needs.

Magnesium phosphate

Phosphate fertilizer

Phosphorite

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Preliminary study on changes of soil CO2 concentration in Gangcha county.

Guangdong nongye kexue (2012)

Hou Yu-le Li Yan

The CO2 concentration in 50-cm-deep soil under different vegetation conditions near Gangcha county seat of Qinghai province was determined.The results showed that CO2 concentration in rape field was significantly higher than that in artificial shrub plantation and lush grass field,but the change of CO2 concentration in lush grass field was the most stable.There was significant and positive correlation between soil CO2 concentration and air temperature,and the variation trend of soil CO2 concentration was the same as that of temperature from the time 10:15 to 17:57.

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Effects of Different Levels of Phosphate Fertilizer Application on Phosphorus Leaching in Vegetable Soils

Journal of Zhangzhou Normal University (2007)

Li Yan

An indoor simulating experiment was conducted with repacked soil columns for studying the effect of phosphate fertilizer application on phosphorus leaching in vegetable soils.Results showed that the concentration and accumulation of TP and DTP in the leachates increased with the increase of phosphate fertilizer applied.The concentration of TP and DTP at each time point had extremely significant positive correlation to the amount of phosphorus application(r range 0.848**-0.995**).The total amount of TP and DTP also had extremely significant positive correlation with the amount of phosphorus application(r=0.963**,0.962**).Phosphorus application increased the content of Olsen-P in every layers of soil.It was indicated that phosphorus applied in an excessive amount would cause the groundwater pollution.

Phosphate fertilizer

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