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Effects of straw incorporation on soil organic matter and soil water-stable aggregates content in semiarid regions of Northwest China
- Source :
- PLoS ONE, Vol 9, Iss 3, p e92839 (2014), PLoS ONE
- Publication Year :
- 2014
- Publisher :
- Public Library of Science (PLoS), 2014.
-
Abstract
- The soil degradation caused by conventional tillage in rain-fed areas of northwest China is known to reduce the water–use efficiency and crop yield because of reduced soil porosity and the decreased availability of soil water and nutrients. Thus, we investigated the effects of straw incorporation on soil aggregates with different straw incorporation rates in semiarid areas of southern Ningxia for a three-year period (2008–2010). Four treatments were tested: (i) no straw incorporation (CK); (ii) incorporation of maize straw at a low rate of 4 500 kg ha−1 (L); (iii) incorporation of maize straw at a medium rate of 9000 kg ha−1 (M); (iv) incorporation of maize straw at a high rate of 13 500 kg ha−1 (H). The results in the final year of treatments (2010) showed that the mean soil organic carbon storage of the 0–60 cm soil layers were significantly (P0.25 mm water-stable macroaggregates level, geometric mean diameter, mean weight diameter and the aggregate stability, which were ranked in order of increasing straw incorporation rates: H/M > L > CK. Straw incorporation significantly (P
- Subjects :
- Environmental Impacts
China
Raw Materials
Rain
Pedology
Materials Science
Soil Science
lcsh:Medicine
Crops
Soil Chemistry
Zea mays
Soil
Agricultural Production
Soil retrogression and degradation
Environmental Chemistry
lcsh:Science
Multidisciplinary
Conventional tillage
Chemistry
Soil organic matter
Ecology and Environmental Sciences
lcsh:R
Biology and Life Sciences
Soil chemistry
Agriculture
Soil carbon
Agricultural Methods
Organic Farming
Soil Ecology
Straw
Crop Management
Agronomy
Physical Sciences
Soil water
Soil horizon
lcsh:Q
Porosity
Agroecology
Research Article
Cereal Crops
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 9
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....536e109a8cf19cfd1f1e5ac4b647b54b