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Effects of different green manure treatments on soil apparent N and P balance under a 34-year double-rice cropping system

Effects of different green manure treatments on soil apparent N and P balance under a 34-year... Purpose Although green manure rotation is often used to promote soil fertility and crop yield, the effects of this management practice on the nitrogen or phosphorus balance and the relationship between nutrient balance and the increase in soil nutrients have not been systematically studied. Materials and methods We investigated the apparent nitrogen and phosphorus balances and their associations with soil nitrogen and phosphorus increases, respectively, in a 34-year-old experimental site with various green manures and rice rotations using linear and logistic models. Cropping treatments included a rice-rice-winter fallow treatment as a control (RRW) and three green manure rotation treatments: rice-rice-ryegrass (RRR), rice-rice-oil rape (RRO), and rice-rice-Chinese milk vetch (RRC). Results and discussion We found that apparent nitrogen and phosphorus balances of RRR, RRO, and RRC were 164, 162, and −2 −2 149 kg hm , which were all significantly lower than 200 kg hm of RRW (P < 0.05). Moreover, the optimal fitted model of the relationship between cumulative nutrient balance and the increase in soil nutrients was different among treatments. Specifically, the correlation coefficients of cumulative nitrogen balance and soil nitrogen increase of RRR, RRO, and RRC in the linear model (0.49, 0.80, and 0.63) were all significantly http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Soils and Sediments Springer Journals

Effects of different green manure treatments on soil apparent N and P balance under a 34-year double-rice cropping system

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References (39)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Environment; Soil Science & Conservation; Environment, general; Environmental Physics
ISSN
1439-0108
eISSN
1614-7480
DOI
10.1007/s11368-018-2049-5
Publisher site
See Article on Publisher Site

Abstract

Purpose Although green manure rotation is often used to promote soil fertility and crop yield, the effects of this management practice on the nitrogen or phosphorus balance and the relationship between nutrient balance and the increase in soil nutrients have not been systematically studied. Materials and methods We investigated the apparent nitrogen and phosphorus balances and their associations with soil nitrogen and phosphorus increases, respectively, in a 34-year-old experimental site with various green manures and rice rotations using linear and logistic models. Cropping treatments included a rice-rice-winter fallow treatment as a control (RRW) and three green manure rotation treatments: rice-rice-ryegrass (RRR), rice-rice-oil rape (RRO), and rice-rice-Chinese milk vetch (RRC). Results and discussion We found that apparent nitrogen and phosphorus balances of RRR, RRO, and RRC were 164, 162, and −2 −2 149 kg hm , which were all significantly lower than 200 kg hm of RRW (P < 0.05). Moreover, the optimal fitted model of the relationship between cumulative nutrient balance and the increase in soil nutrients was different among treatments. Specifically, the correlation coefficients of cumulative nitrogen balance and soil nitrogen increase of RRR, RRO, and RRC in the linear model (0.49, 0.80, and 0.63) were all significantly

Journal

Journal of Soils and Sediments – Springer Journals

Published: Jun 4, 2018

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