Planting Model of ‘Green Manure+Native-growing Grass’ and Evaluation of Effect of Substituting Fertilizer in Citrus Production

The planting mode of ‘green manure (astragalus) +native-growing grass’ was popularized on Citrus in Shunchang, which can provide N 15.18 kg per 667 m² per year, among which the green manure (astragalus) provides N 7.17 kg and can substitute 25.6% of fertilizer nitrogen. Also this mode could provide organic matter 727.8 kg per year with the increase of 1.21 g·kg^-1 per year in the tillage layer, and had significant effect in increasing yield and fruit quality.