Effects of Different Grain(Vegetable)→Tobacco Rotation Patterns on the Physical and Chemical Properties of Soil and the Economic Characters of Tobacco Leaves
Flue-cured tobacco is a typical crop that can not be planted continuously.In order to explore the effects of different grain→tobacco and vegetable→tobacco rotation patterns on increasing soil productivity and mitigating the harm of continuous cropping In this paper,flue-cured tobacco was used as a control,and four kinds of grain(vegetable)crops with high economic value,such as waxy corn,cabbage,zucchini and green beans were selected for rotation with flue-cured tobacco.The effects of different tobacco→grain(vegetable)rotations on the physical and chemical properties of soil and tobacco economic traits were analyzed by measuring the soil physical and chemical properties,main enzyme activities,and tobacco economic traits of different treatments.The results showed that the rotation treatment of flue-cured tobacco with waxy corn,zucchini,Chinese cabbage could increase soil capillary porosity,increase soil water content and improve soil physical properties.The rotation treatment of waxy corn and vegetables increased soil organic matter and total nitrogen content,increased soil urease and sucrase activities,and increased soil alkali-hydrolyzed nitrogen content by 34.30～152.90 mg/kg.The soil phosphatase activity and available phosphorus content were significantly increased by the rotation treatment of zucchini,the content of available phosphorus in soil increased by 1.19 mg/kg.The soil phosphatase activity and available phosphorus in the rotation of waxy corn,zucchini and green beans were significantly reduced,and the available phosphorus content decreased by1.09～3.51 mg/kg.The content of soil available potassiumin the soil of rotational waxy corn and vegetable decreased significantly,by17.52～59.27 mg/kg.The highest yield of flue-cured tobacco was obtained by rotation of green bean,the average price of flue-cured tobacco was higher by rotation of waxy corn and zucchini,and the highest output value was obtained by rotation of waxy corn and Chinese cabbage,which was 54800 yuan/hm2.In a word,the rotation of flue-cured tobacco with waxy corn,Chinese cabbage and green bean was beneficial to improving soil physical and chemical properties,enhancing soil fertility,and increasing the yield and output value of subsequent flue-cured tobacco.which was an ideal rotation pattern.However,when flue-cured tobacco is rotated with waxy corn,Chinese cabbage and green bean,It is necessary to reduce the amount of nitrogen fertilizer and increase the amount of potassium fertilizer.
NETL
NSTL
万方数据
