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- Title
长江中游典型稻田种植模式的经济效益及土壤固氮 能力比较.
- Authors
袁嘉欣; 杨滨娟; 黄国勤
- Abstract
In order to compare the economic benefits and soil nitrogen fixation capacity of different planting patterns in the Middle Reaches of the Yangtze River, five typical paddy field cropping patterns were set up for field positioning test, including Chinese milk vetch-early rice-late rice (CRR, CK), rape-early rice-late rice (RRR), potato-early rice-late rice (PRR), Chinese milk vetch-early rice-sweet potato||late soybean (CRI), rape-early rice-sweet potato||late soybean (RRI). The results showed that, compared with CK, RRI, PRR, RRR, CRI increased rice yield by 16.40%-32.85% and 21.04%-49.60%(P<0.05). The crop yields of RRI and PRR were higher. The economic benefits of RRI and PRR were better, which were significantly higher than CK by 30.27%, 44.15% and 65.13%, 51.38% respectively (P<0.05). Compared with that of CK, the content of soil microbial biomass nitrogen in CRI and RRI was increased by 53.57%-58.85% (P < 0.05), and the microbial biomass C/N ratio was decreased. In addition, compared with CK, CRI, RRI reduced soil No3-N residue, the content of soil nitrate nitrogen in CRI and RRI was reduced by 48.35%-69.23% (P < 0.05). Among them, RRI and PRR pattern could increase crop yield, enhance the effective output of nitrogen and economic benefits. Paddy upland rotation treatment enhanced soil microbial nitrogen fixation potential and reduced the risk of soil nitrogen loss. So, rape-early rice-sweet potato||late soybean and potato-early rice-late rice have a better comprehensive effect of increase yield, economic benefits and nitrogen fixation, which can be popularized and applied in the Middle Reaches of Yangtze River.
- Subjects
NITROGEN fixation; NITROGEN in soils; SWEET potatoes; FIELD crops; PADDY fields; CROP yields
- Publication
Ecological Science, 2023, Vol 42, Issue 3, p143
- ISSN
1008-8873
- Publication type
Article
- DOI
10.14108/j.cnki.1008-8873.2023.03.018