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Effects of soil acidity adjustment on nutrient absorption and dry matter accumulation in tobacco

Tang Lina 1 Xiong Dezhong 2 Liu Shuxin 2 ( 1College of Crop Science; 2Department of Land and Environmental Science,Fujian Agricultural University,Fuzhou 350002)  
The acid soil pH could be properly raised to increase bacteria,actionmyces and aerobic cellulose decomposing bacteria and to promote mineralization of simple structured organisms,thus nitrogen supply of the soil was increased.When soil pH was 5.6 6.6,phosphatase activity and phosphorus availability were enhanced,which was favourable for tobacco to absorb nitrogen,phosphorus and potassium.The utilizaton ratio of N,P,K fertilizer would increased.Along with the raise of soil pH,the availability of magnesium and some micro ele ments such as boron and zinc was declined,which inhibited the absorption of tobacco.Therefore,when lime was applied to acid soi,pH should not be too high and potassium should be added,combined with appropriate amount of magnesium and micro elements.The adjustment of pH in acid soil from 5.0 to 5.6 6.6 was helpful to dry matter accumulation and optimal proportion of components in tobacco,so as to keep high quality.
【CateGory Index】: S572.06
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