Effects of Green Manure Mixed Cropping Patterns on Physical and Chemical Properties of Soil and Economic Characters of Flue-cured Tobacco

绿肥混作对植烟土壤理化性状和烤烟经济性状的影响（英文）

[Objective] The aim was to clear the suitable green manure cropping pat- terns in Xiangxi tobacco-planting areas. [Method] 8 treatments were set to study the effects of the monoculture and mixed cropping of common vetch （Vicia gigantea Bge.）, perennial ryegrass （Lofium） and rapeseed （Brassica campestris L.） on physi- cal and chemical properties of soil and economic characters of flue-cured tobacco. [Result] （1） Green manure turnover can reduce soil bulk density by 1.08%-8.62%, and the effect of green manure mixed cropping pattern was the best. （2） Green manure turnover also can increase the soil nutrient, soil organic matter, total nitro- gen （N）, total phosphorus （P）, total potassium （K）, alkali-hydrolyzale N, rapidly available P and rapidly available K by 1.44%-6.10%, 0.01-0.12 g/kg, 1.89%- 11.32%, 0.12%-3.56%, 1.06%-11.76%, 0.04%-18.93% and 0.98%-23.12%, respec- tively, and the effect of the monoculture of common vetch was the best.（3） The overall change of soil pH was not obvious.（4）Green manure turnover can increase the yield and output of flue-cured tobacco, and the effect of the monoculture of common vetch was the best. [Conclusion] The monoculture of common vetch can be generalized in the dry land of Xiangxi tobacco-planting areas.

[目的]明确湘西烟地适宜绿肥种植模式。[方法]设8个处理研究箭舌豌豆、黑麦草、油菜的单作和混作对土壤理化性状和烤烟经济性状的影响。[结果]1绿肥翻压还田可降低土壤容重1.08%～8.62%,以绿肥混作降低土壤容重效果最好。2绿肥翻压还田能提高土壤养分,土壤有机质、全氮、全磷、全钾、碱解氮、速效磷和速效钾含量分别提高1.44%～6.10%,0.01～0.12 g/kg,1.89%～11.32%,0.12%～3.56%,1.06%～11.76%,0.04%～18.93%和0.98%～23.12%,以箭舌豌豆单作提高土壤养分的效果最好。3土壤p H整体变化不大。4绿肥翻压还田能提高烤烟产量和产值,以箭舌豌豆单作的烤烟产量和产值最高。[结论]在湘西州烟区旱地以推广种植箭舌豌豆单作模式为好。