[1]CHEN Jing,ZHANG Jianguo,ZHAO Ying,et al.Effects of Straw and Biochar Amendment on Greenhouse Gases Emission in Wheat-Maize Rotation Cropland in Guanzhong Area[J].Research of Soil and Water Conservation,2018,25(05):170-178.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
170-178
Column:
Public date:
2018-09-06
- Title:
-
Effects of Straw and Biochar Amendment on Greenhouse Gases Emission in Wheat-Maize Rotation Cropland in Guanzhong Area
- Author(s):
-
CHEN Jing1,2, ZHANG Jianguo1,2, ZHAO Ying1,2, ZHANG Afeng1,2, CHENG Gong1,2, FENG Hao2,3
-
1. College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, Shaanxi, China;
2. Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China;
3. Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
-
- Keywords:
-
straw amendment; biochar application; maize-wheat rotation; greenhouse gases; net global warming potential; Guanzhong Area
- CLC:
-
S314
- DOI:
-
-
- Abstract:
-
In order to reveal the effects of straw and biochar amendment on greenhouse gases (GHG) emission and crop yield, the farmland ecosystem of maize-wheat rotation in Guanzhong Plain of China was taken as the study area. The annual GHG emissions (CO2, CH4, and N2 O) from a wheat-maize rotation system with straw and biochar amendment were monitored using the static opaque chamber and gas chromatography technique. Five field treatments in the study including conventional fertilization (N), fertilization and 4 t/hm2 straw (NS) amendment, fertilization and 4 t/hm2 biochar (NBClow) amendment, fertilization and 8 t/hm2 biochar (NBChigh) amendment. CK was without straw, biochar and fertilizer. The results showed that:(1) compared with N treatment, annual N2 O emission decreased by 13.21% and 23.75% under NBClow and NBChigh treatment, respectively, and no significant difference was observed under straw application; (2) compared with N treatment, annual CO2 emission increased by 44.06% under NS treatment, but decreased by 9.94% under NBChigh treatment; (3) compared with N treatment, annual CH4 emission increased by 42.32%, 76.38% and 73.23%, respectively, under NS, NBClow and NBChigh treatment; (4) yield increased by 13.73%, 20.37% and 7.56%, respectively, under NS, NBClow and NBChigh treatment as compared to N treatment, and decreased by 10.64% under NBChigh treatment as compared to NBClow treatment; (5) the NGWP decreased by 33.59 t/hm2 and 48.33 t/hm2, respectively, under NBClow and NBChigh treatment as compared to N treatment, and the NGHGI decreased by 2.53 t/t and 4.21 t/t, respectively, under NBClow and NBChigh treatment as compared to N treatment. In summary, it is concluded that biochar application of 4 t/hm2 can be used as an effective management to carbon sequestration and increase crop yields under the wheat-maize rotation system in Guanzhong Area.