Effect of different amount of straw mulching on soil enzyme activities in dry land |
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DOI:10.7606/j.issn.1000-7601.2009.04.29 |
Key Words: spring maize straw mulching soil enzyme activities |
Author Name | Affiliation | LI Qian | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A &F University, Yangling, Shaanxi 712100, China | ZHANG Rui | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A &F University, Yangling, Shaanxi 712100, China | JIA Zhikuan | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A &F University, Yangling, Shaanxi 712100, China |
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Abstract: |
Field fixed position experiments were conducted to study the effect of different amount of straw covering on soil enzyme activitie
s in Heyang Country of Shaanxi Province. The results showed that: Straw covering could accelerate soil enzymatic activities, in the layer between 0 cm and 20 cm the activities of invertase and alkaline phosphatase were 46.9% and 9.0% higher respectively than that in the control and reached the maximum when the fields were mulched with 9 000 kg/hm2 of maize straw; Urease activity reached the maximum when the fields were mulched with 13 500 kg/hm2 of maize straw,and urease activity in the surface increased by 3.6 times compared to the control; With the increase of soil depth, the activities of urease, invertase and catalase reduced, and the difference of alkaline phosphatase activity in different levels was not significant. |
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