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Effects of biochar amendment on rapeseed and sweet potato yields and water stable aggregate in upland red soil

Authors :
Qiuxia Li
Jiabao Zhang
Xiao-Min Chen
Yan Jing
Zu-xiang Liu
Qianru Huang
Source :
CATENA. 123:45-51
Publication Year :
2014
Publisher :
Elsevier BV, 2014.

Abstract

A field experiment was conducted to study the effect of biochar amendment (0, 2.5, 5, 10, 20, 30 and 40 t·ha− 1) on rapeseed and sweet potato yields, aggregate particle size distribution, aggregate stability, soil organic carbon, total N content and C:N ratio in soil water stable aggregate under a rapeseed–sweet potato rotation system in upland red soil in Jiangxi Province of southern, China. The results were as follows: compared with control treatment (CK), when the amount of biochar was 40 t·ha− 1, rapeseed and sweet potato yields were increased by 36.02% and 53.77% respectively; the soil water stable aggregate (> 0.25 mm) in the 0–15 cm soil layer had a remarkable increase than other treatments, especially the macroaggregate with particle size larger than > 2 mm. In the rapeseed harvest season, the mean weight diameter of soil water stable aggregate was enhanced by 28.02% compared to CK with the application rate of biochar being 40 t·ha− 1. A significant increment in soil organic carbon, total N and C:N ratio was observed in the > 2 mm, 2–0.5 mm, 0.5–0.25 mm and

Details

ISSN :
03418162
Volume :
123
Database :
OpenAIRE
Journal :
CATENA
Accession number :
edsair.doi...........1ca1ba7b3a742723083ba6598b58427a