Effects of Phosphorus Contortion and Application of Chemical Fertilizer on Soil Enzyme Activities in Flue-cured Tobacco

doi:10.7668/hbnxb.2018.S1.036

Abstract

Abstract: The current agricultural cultivation is highly dependent on chemical fertilizers,resulting in the deterioration of the micro-ecological environment of the soil. In order to improve the biological characteristics of the soil and fertility, The effects of green manure (an annual) as green manure or chemical fertilizer on the activities of invertase,urease,phosphatase and catalase in flue-cured tobacco soil were studied. The results showed that the activity of four enzymes could be significantly increased by overturning of grass rhinoceros,and the soil enzyme activity increased with the increase of the amount of green manure. Compared with the blank control (CK2),the third batch of grass rhinoceros (overturned on September 18 with a biomass of 32 180 kg/ha) had the largest increase in enzyme activity,with the maximum increase being:sucrase June 48.4%,91.5% for urease in April,72.4% for phosphatase in August,and 51.6% for catalase in October. In the treatment of green manure and chemical fertilizers,the treatment of green manure + chemical fertilizer was higher than that of the control (CK1,only chemical fertilizer), the effect of the third batch of overturning green manure plus conventional fertilization on soil enzyme activity was better than that of green manure plus 30% nitrogen reduction, The first batch (turnover on August 3,biomass was 19 350 kg/ha) and the second batch (biomass,22 930 kg/ha on August 18) were overturned.The different of soil enzyme activity between green manure+conventional fertilization and green manure+nitrogen reduction 30% was not significant,and urease and phosphatase were particularly prominent. The characteristics of the dynamic changes of enzymes in different growth stages of tobacco plants were as follows:soil sucrase,urease,and phosphatase in all treatments with overturn green manure green manure,and chemical fertilizers all peaked in the long-term (June) peak. Catalase A peak appeared in the early stage (August) of tobacco leaf harvest. The above results indicated that the soil metabolism was very active after the rhizome was pressed,which was conducive to the nutrient transformation of the soil and provides the necessary nutrition for the normal growth of the flue-cured tobacco.

Key words: Green manure, Melilotus officinalis L., Flue-cured tobacco, Soil enzyme activity

CLC Number:

S311
S141

WANG Panpan, CHANG Chunli, YANG Xinyu, LI Hui, HE Guoqiang, LI Hengquan, WANG Jingying. Effects of Phosphorus Contortion and Application of Chemical Fertilizer on Soil Enzyme Activities in Flue-cured Tobacco[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(S1): 222-229. doi: 10.7668/hbnxb.2018.S1.036.

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