Soil Enzymes Activities in Irrigated and Rain-Fed Vertisols of the Semi-Arid Tropics of Sudan

2009 ◽  
Vol 4 (3) ◽  
pp. 67-79 ◽  
Author(s):  
Mubarak A. Abdalla ◽  
Uwe Langer
Keyword(s):  
Soil Enzymes ◽  
Enzymes Activities ◽  
Semi Arid

scholarly journals Effects of Different Mechanized Organic Fertilization Methods on Soil Enzymes Activities in a Corn Field

2019 ◽  
Vol 233 ◽  
pp. 042008 ◽  
Author(s):  
Qiping Dong ◽  
Xin Cheng ◽  
Siwei Zhang ◽  
Chunming Bai ◽  
Di Wu ◽  
...  
Keyword(s):  
Soil Enzymes ◽  
Organic Fertilization ◽  
Enzymes Activities ◽  
Corn Field

The effects of three root exudated fatty acids on peanut (Arachis hypogaeaL.) growth and soil enzymes activities

2013 ◽  
Vol 33 (11) ◽  
pp. 3332-3339 ◽  
Author(s):  
刘苹 LIU Ping ◽  
赵海军 ZHAO Haijun ◽  
仲子文 ZHONG Ziwen ◽  
孙明 SUN Ming ◽  
庞亚群 PANG Yaqun ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Soil Enzymes ◽  
Enzymes Activities

scholarly journals Seasonality and moisture regime control soil respiration, enzyme activities, and soil microbial biomass carbon in a semi-arid forest of Delhi, India

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Urvashi Tomar ◽  
Ratul Baishya
Keyword(s):  
Microbial Biomass ◽  
Soil Respiration ◽  
Carbon Cycling ◽  
Significant Role ◽  
Soil Enzymes ◽  
Microbial Biomass Carbon ◽  
Phenol Oxidase ◽  
Peak Time ◽  
Biomass Carbon ◽  
Semi Arid

Abstract Soil respiration, soil enzymes, and microbial biomass are important in carbon cycling in the terrestrial ecosystem which is generally limited by environmental factors and soil carbon availability. Hence, we tried to assess the factors affecting the functional aspects of these processes in a semi-arid climate. We monitored soil respiration (surface) using a portable infrared gas analyzer (Q-Box SR1LP Soil Respiration Package, Qubit Systems, Canada) equipped with a soil respiration chamber (Model: G 180). Soil respiration was measured at midday during each season throughout the study period. Soil enzymatic activities and microbial biomass carbon (MBC) were analyzed following the standard protocol for a year during peak time in four seasons at 0–10 cm and 10–20 cm depth. Soil respiration shows significant variation with highest in monsoon (3.31 μmol CO2 m−2 s−1) and lowest in winter (0.57 μmol CO2 m−2 s−1). Similarly, β-glucosidase, dehydrogenase, and phenol oxidase activity ranged from 11.15 to 212.59 μg PNP g−1 DW h−1, 0.11 to 16.47 μg TPF g−1 DW h−1, and 4102.95 to 10187.55 μmol ABTS+ g−1 DW min−1, respectively. MBC ranged from 17.08 to 484.5 μg C g−1. Besides, soil respiration, soil enzymes (except β-glucosidase), and MBC were significantly correlated with soil moisture. Seasonality, optimum moisture and temperature played a significant role in determining variations in soil microbiological processes (except β-glucosidase activity); the carbon cycling in the study area is assisted by enzyme activity; dehydrogenase and phenol oxidase played a significant role in soil respiration; hence, this landscape is sensitive to environmental changes.

Effects of a one-time application of bentonite on soil enzymes in a semi-arid region

2018 ◽  
Vol 98 (3) ◽  
pp. 542-555 ◽  
Author(s):  
Junzhen Mi ◽  
Edward G. Gregorich ◽  
Shengtao Xu ◽  
Neil B. McLaughlin ◽  
Jinghui Liu
Keyword(s):  
Alkaline Phosphatase ◽  
Enzyme Activity ◽  
Arid Region ◽  
Soil Enzymes ◽  
Soil Health ◽  
Experimental Period ◽  
Growth Stages ◽  
Long Term Effects ◽  
Semi Arid Region ◽  
Semi Arid

Soil enzymes play a key role in many soil processes that affect soil health and which may be adversely affected under a changing climate. We investigated the short- and long-term effects of bentonite amendments on soil catalase, invertase, urease, and alkaline phosphatase activity in a field experiment in a semi-arid region in northern China. Treatments included six rates of bentonite amendments (0, 6, 12, 18, 24, and 30 Mg ha−1) applied only once in 2011. Addition of bentonite had a significant (P < 0.01) effect on the activity of each enzyme at different layers and days after millet sowing. Observed increases in catalase, invertase, urease, and alkaline phosphatase activities were up to 42%, 46%, 58%, and 50%, respectively, and they were approximately linear with increasing bentonite rate up to 24 Mg ha−1over the 5 yr experimental period. Averaged over 5 yr, the 24 Mg ha−1rate of bentonite amendment led to the largest effect on soil enzyme activity in all soil layers at five growth stages over the growing season. The observed increased enzyme activity suggests that bentonite can help maintain and improve soil health to support plant growth and contribute to sustainable agriculture production in a semi-arid environment.

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