Monitoring of soil biochemical quality parameters under greenhouse spinach cultivation through animal waste recycling |
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Authors: | Binoy Sarkar Hong Lim Choi Kun Zhu Asit Mandal Bhabananda Biswas Arumuganainar Suresh |
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Affiliation: | 1. Future Industries Institute (FII), University of South Australia, Mawson Lakes, SA, Australia;2. Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Gwanak-ku, Seoul, Republic of Korea;3. Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark;4. Division of Soil Biology, Indian Institute of Soil Science, Bhopal, Madhya Pradesh, India;5. Department of Biotechnology, Vels University, Chennai, Tamil Nadu, India |
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Abstract: | Under the intensive agricultural system, direct application of animal slurries to soils can provide a sustainable disposal of these wastes by inducing positive changes in soil quality and fertility. However, how animal wastes quantitatively affect the key nutrients (C, N, P and S) transforming soil enzymes is not clearly known. A greenhouse spinach cultivation study demonstrated that pig slurry, either in raw (RS) or processed (aerobically aged) (PS) form, significantly (p?.05) improved the enzymatic activities (phosphatase (10–36%), β-glucosidase (23–39%), urease (59–103%), nitrate reductase (73–103%) and dehydrogenase (27–72%)) and microbial growth in soil as compared to the unamended control. However, it did not significantly (p?>?.05) alter the aryl sulphatase enzyme activity. Slurry applications also significantly improved the macro (N, P and K) and micronutrients (Cu, Mn, Zn and Fe) uptake by spinach plant and hence the yield (2.9–3.38 times higher than control). Similarly, compared to chemical fertilisers the application of pig slurries improved soil biological and biochemical parameters as well as plant nutrients uptake. This study demonstrated the closing of global energy and nutrient cycles through land application of animal wastes without compromising the crop yield. |
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Keywords: | land application slurry disposal nutrients recycling soil enzymes soil microbial activity |
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