Effects of Biochar on Plant Growth and Nutrients in Aeolian Sandy Soil
In order to investigate the plant growth and nutrient content changes in aeolian sandy soil improved by different concentrations and species of biochar,a field experiment was carried out on the aeolian sand soil of Zhangwu typhoon sand land improvement and utilization research institute in Liaoning province.In that experiment,oat grass was use as the test plant,and straw char,charcoal and grass char were applied to the aeolian sandy soil evenly with 5 different concentration gradients of each biochar.Oat grass was grown for 12 weeks and samples were collected for laboratory test.By analyzing plant height,yield,chlorophyll content,nitrogen,phosphorus and potassium content of oat grass under different improved conditions,the effects of biochar on plant growth and nutrient in aeolian sandy soil were studied.The results showed that the growth and nutrient content of oat grass in aeolian sandy soil were significantly correlated with different biochar(p<0.05),and the plant height,yield and nutrient content of oat grass were significantly increased by the application of straw charcoal with a concentration of 4 kg·m-2,and the plant height was 109.242 cm,the plant height was 109.242 cm,the yield was 229.25 kg·hm-2,chlorophyll a and b were 2.941 mg·g-1 and 0.991 mg·g-1 respectively,and the contents of nitrogen,phosphorus and potassium were 3.411,0.927,28.766 g·kg-1 respectively.Therefore,the application of appropriate biochar can not only improve soil,but also increase plant yield and nutrient content,and improve crop yield at the same time of effective soil utilization.
万方数据
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