Impact of Tillage and Straw Treatment Methods on Rice Growth and Yields in a Rice–Ratoon Rice Cropping System

The rice–ratoon rice cropping system has the advantages of saving labor and imparting economic benefits. Optimizing tillage and straw management is beneficial for improving ratoon rice growth and yield. In this study, field experiments were conducted to examine the effects of four tillage and straw...

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Bibliographic Details
Published in:Sustainability 2022-08, Vol.14 (15), p.9290
Main Authors: Li, Shengchun, Zhang, Yilin, Guo, Lihao, Li, Xiaofang
Format: Article
Language:English
Subjects:
Agricultural production
Cereal crops
Chlorophyll
Crop yield
Crop yields
Cropping systems
Environmental aspects
Enzymes
Farm buildings
Fertilizers
Field tests
Food security
Grain
Harvest
Leaf area
Leaf area index
Leaves
Methods
Oxidation
Photosynthesis
Physiological aspects
Plows
Residues
Rice
Rice fields
Seasons
Straw
Sustainability
Tillage
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Summary:The rice–ratoon rice cropping system has the advantages of saving labor and imparting economic benefits. Optimizing tillage and straw management is beneficial for improving ratoon rice growth and yield. In this study, field experiments were conducted to examine the effects of four tillage and straw managements on the growth and yield of a rice–ratoon rice cropping system in central China in 2020 to 2021. The managements included no-till with main-season and ratoon-season rice residues retained on the soil’s surface (NT+S), plow tillage with residue retention (CT+S), no-till with residues removed (NT-S), and plow tillage with residues removed (CT-S). Compared to NT, CT significantly increased yield by 33.70% and 29.12% in the main and ratoon seasons, respectively. Compared to straw removal, straw returning significantly increased yield by 13.37% and 27.29% in the main and ratoon seasons, respectively. In general, both CT and straw returning improved root function (root activity and root dry weight) and photosynthetic capacity (leaf area index, net photosynthetic rate, and leaf chlorophyll content). CT combined with straw returning was able to achieve the highest annual rice yield.
ISSN:2071-1050
2071-1050
DOI:10.3390/su14159290