Influence of Non-tillage on Soil Properties, Kenaf Growth and Yield

To save the production cost and improve the planting efficiency of kenaf,a rice – kenaf rotation field was chosen as experimental field to study the different infuence of tillage and non- tillage on soil properties and crop growth. The results showed that the root number of grade 3 during seedling stage had a significant difference between non- tillage and tillage,the roots of non- tillage were 737. 80 and of tillage were 584. 80 respectively. Moreover,fresh weight and dry weight per plant root,stem,and leaf also existed significantly different between non- tillage and tillage. The dry weight of non- tillage was heavier. Furthermore,the dry biological yield per plant had a significant difference between non-tillage and tillage,and the weight was 3. 34 g and 1. 92 g respectively. Soil bulk density had a significant difference between non- tillage and tillage as well,the average values were 1. 3354 g / cm3and 1. 1888 g / cm3respectively. In general,non- tillage soil moisture content was on the decline,tillage soil moisture content was on the increase,but the average value of non- tillage and tillage had no significant differ-ence,they were 33. 24% and 32. 43% respectively. During different periods,the average value of soil porosity had a significant difference,the average values were 49. 61% and 55. 14% respectively. Dry bark of plots had a significant difference between non- tillage and tillage,the weights were 5. 79kg and 5. 29 kg respectively.