关键词: 烤烟, 绿肥, 套作, 土壤酶活性, 农艺性状, 化肥减施

Abstract: In order to explore the suitable fertilization model for the growth of flue-cured in Binxi tobacco region of Heilongjiang,using field experiment,Y1(intercropping rhinoceros+30% reduction in fertilization),Y2(intercropping rhinoceros+no fertilization),Y3(intercropping wheat+30% reduction in fertilization),Y4(intercropping wheat+no fertilization),Y5(not intercropping green manure+conventional fertilization),Y6(not intercropping green manure+30% reduction in fertilization) and CK(not intercropping green manure+no fertilization)treatments were set,and the effect of intercropping green manure and application of chemical fertilizers on agronomic traits,soil enzyme activity,potassium content in different parts of tobacco plant,and economic traits of flue-cured tobacco were studied.The results showed that,during the flattening period of tobacco,intercropping green manure+30% reduction in fertilization treatment had obvious increase effect in the number of leaves and maximum leaf area of flue-cured tobacco,which increased by 1.56%—3.47% and 1.58%—2.57% compared with Y5 treatment ,improved the potassium content in the stem and leaf parts of tobacco,but had no significant effect on the potassium content in the roots.For soil sucrase and catalase activities,intercropping green manure+30% reduction in fertilization was appropriate,but urease and phosphatase activities were better when only intercropping green manure.In addition,intercropping green manure+30% reduction in fertilization treatment could increase the economic traits of flue-cured tobacco,the quality of single leaf,orange smoke ratio,yield and output value,compared with Y5 treatment,the increases were 3.01%—3.28% (P>0.05),44.29%—131.72%(P<0.05),1.36%—4.58%(P>0.05) and 1.45%—9.82%(P>0.05).In summary,from the perspective of sustainable development of green agriculture,intercropping wheat or rhinoceros+30% reduction in fertilization is more suitable in the Binxi area of Heilongjiang.

Key words: Flue-cured tobacco, Green manure, Intercropping, Soil enzyme activity, Agronomic traits, Reduced application of chemical fertilizer