Temporal and spatial disparities of soil enzyme activities during the spring wheat growing season under different tillage systems

Abstract

Abstract: Based on field experiments conducted in Dingxi on the western Loess Plateau, the effects of four treatments: conventional tillage (T), conventional tillage with stubble retention (TS), no tillage with no stubble retention (NT), no tillage with stubble retention (NTS) on temporal and spatial disparities of soil enzyme activities during the spring wheat growing season were studied. Soil catalase, urease, alkaline phosphatase and invertase activities under NTS were significantly higher than those under T, being 24.02%, 8.74%, 20.51% and 31.45% respectively at 0-30 cm depth during spring wheat growing seasons, while the effects of NT and TS on soil enzyme activities were seasonal. There was a decreasing trend of soil enzyme activities with increasing soil depth under NT and NTS treatments. Soil catalase, urease, alkaline phosphatase and invertase activities under T treatment and soil urease and alkaline phosphatase activities under TS treatment increased then decreased with increasing soil depth, while soil catalase and invertase activities under TS treatment decreased. Analysis of variance indicated that the greatest effects of the growing seasons were on soil urease activity, and of tillage and cover on soil invertase activity, while soil catalase activity had the most effect on the interactions of various factors.

CLC Number:

S344
S154.2

LUO Zhu-zhu, HUANG Gao-bao, CAI Li-qun, ZHANG Ren-zhi, LI Ling-ling, XIE Jun-hong. Temporal and spatial disparities of soil enzyme activities during the spring wheat growing season under different tillage systems[J]. Acta Prataculturae Sinica, 2012, 21(6): 94-101.

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