Soil enzyme activities with greenhouse subsurface irrigation

IMR OpenIR

	Soil enzyme activities with greenhouse subsurface irrigation
其他题名	Soil Enzyme Activities with Greenhouse Subsurface Irrigation
	Zhang YuLong; Wang YaoSheng
	2006
发表期刊	PEDOSPHERE
ISSN	1002-0160
卷号	16 期号:4 页码:512-518
摘要	Various environmental conditions determine soil enzyme activities, which are important indicators for changes of soil microbial activity, soil fertility, and land quality. The effect of subsurface irrigation scheduling on activities of three soil enzymes (phosphatase, urease, and catalase) was studied at five depths (0-10, 10-20, 20-30, 30-40, and 40-60 cm) of a tomato greenhouse soil. Irrigation was scheduled when soil water condition reached the maximum allowable depletion (MAD) designed for different treatments (-10, -16, -25, -40, and -63 kPa). Results showed that soil enzyme activities had significant responses to the irrigation scheduling during the period of subsurface irrigation. The neutral phosphatase activity and the catalase activity were found to generally increase with more frequent irrigation (MAD of -10 and -16 kPa). This suggested that a higher level of water content favored an increase in activity of these two enzymes. In contrast, the urease activity decreased under irrigation, with less effect for MAD of -40 and -63 kPa. This implied that relatively wet soil conditions were conducive to retention of urea N, but relatively dry soil conditions could result in increasing loss of urea N. Further, this study revealed that soil enzyme activities could be alternative natural bio-sensors for the effect of irrigation on soil biochemical reactions and could help optimize irrigation management of greenhouse crop production.
其他摘要	Various environmental conditions determine soil enzyme activities, which are important indicators for changes of soil microbial activity, soil fertility, and land quality. The effect of subsurface irrigation scheduling on activities of three soil enzymes (phosphatase, urease, and catalase) was studied at five depths (0-10, 10-20, 20-30, 30-40, and 40-60 cm) of a tomato greenhouse soil. Irrigation was scheduled when soil water condition reached the maximum allowable depletion(MAD) designed for different treatments (-10, -16, -25, -40, and -63 kPa). Results showed that soil enzyme activities had significant responses to the irrigation scheduling during the period of subsurface irrigation. The neutral phosphatase activity and the catalase activity were found to generally increase with more frequent irrigation (MAD of -10 and -16kPa). This suggested that a higher level of water content favored an increase in activity of these two enzymes. In contrast,the urease activity decreased under irrigation, with less effect for MAD of -40 and -63 kPa. This implied that relatively wet soil conditions were conducive to retention of urea N, but relatively dry soil conditions could result in increasing loss of urea N. Further, this study revealed that soil enzyme activities could be alternative natural bio-sensors for the effect of irrigation on soil biochemical reactions and could help optimize irrigation management of greenhouse crop production.
关键词	PHOSPHATASE-ACTIVITY PHOSPHORUS WOODLAND ACID irrigation scheduling soil enzyme activity subsurface irrigation tomato
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:2461935
引用统计	被引频次：21[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/155832
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Zhang YuLong,Wang YaoSheng. Soil enzyme activities with greenhouse subsurface irrigation[J]. PEDOSPHERE,2006,16(4):512-518.
APA	Zhang YuLong,&Wang YaoSheng.(2006).Soil enzyme activities with greenhouse subsurface irrigation.PEDOSPHERE,16(4),512-518.
MLA	Zhang YuLong,et al."Soil enzyme activities with greenhouse subsurface irrigation".PEDOSPHERE 16.4(2006):512-518.