title: [Effects of Short-time Conservation Tillage Managements on Greenhouse Gases Emissions from Soybean-Winter Wheat Rotation System].
abstract: Field experiments including one soybean growing season and one winter-wheat growing season were adopted. The experimental field was divided into four equal-area sub-blocks which differed from each other only in tillage managements, which were conventional tillage (T) , no-tillage with no straw cover ( NT) , conventional tillage with straw cover (TS) , and no-tillage with straw cover (NTS). CO₂ and N₂O emission fluxes from soil-crop system were measured by static chamber-gas chromatograph technique. The results showed that: compared with T, in the soybean growing season, NTS significantly increased the cumulative amount of CO₂ (CAC) from soil-soybean system by 27.9% (P = 0.045) during the flowering-podding stage, while NT significantly declined CAC by 28.9% (P = 0.043) during the grain filling-maturity stage. Compared with T, NT significantly declined the cumulative amount of N₂O (CAN) by 28.3% (P = 0.042) during the grain filling-maturity stage. In the winter-wheat growing season, compared with T, TS and NT significantly declined CAC by 24.3% (P = 0.032) and 36.0% (P = 0.041) during the elongation-booting stage, and also declined CAC by 26.8% (P = 0.027) and 33.1% (P = 0.038) during the maturity stage. During the turning-green stage, compared with T treatment, NT, NTS, and TS treatments had no significant effect on CAN, while NTS significant declined CAN by 42.0% (P = 0.035) compared with NT. Our findings suggested that conservation tillage managements had a more significant impact on CO₂ emission than 20 emission from soil-crop system.
authors.forename: Yan
authors.initials: Y
authors.lastname: Xie
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.forename: Zheng-hua
authors.initials: ZH
authors.lastname: Hu
authors.forename: Shu-tao
authors.initials: ST
authors.lastname: Chen
authors.forename: Han
authors.initials: H
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Ling
authors.forename: Shuang-he
authors.initials: SH
authors.lastname: Shen
mesh_terms: D000383:Agriculture / Q000379:methods*; D000393:Air Pollutants / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis; D005740:Gases / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis; D012987:Soil; D013025:Glycine max / Q000254:growth & development*; D014908:Triticum / Q000254:growth & development*
chemical_list: D000393:Air Pollutants; D005740:Gases; D012987:Soil; D002245:Carbon Dioxide; D009609:Nitrous Oxide