Effect Of Planting Years In Southern Xinjiang Orchard Soil Nutrients And Organic Carbon Components

Research arid area of oasis orchard soil nutrients and organic carbon component can provide basic information and scientific basis for sustainable development and sustainable use of soil in Xinjiang fruit industry. By Jujube Orchard Walnut Variation of soil nutrients in southern Xinjiang compare different cultivation years and the organic carbon component content analysis Different Planting Years on Jujube Orchard and Walnut soil nutrients and organic carbon component of, draw the following conclusions :(1) With the increase of growth years, jujube orchard soil organic matter, total nitrogen and available phosphorus content showed the first increase after decreasing trend, there is a significant correlation between age and jujube, organic matter content the flourishing representing an increase of 42.19 percent of the young fruit period nitrogen increased by 24.05% and 32.59% compared with the young and the elderly of the period. Different ages of potassium was not significantly different; with increasing age, the Walnut soil organic matter, total nitrogen and potassium increases first and then decreased as the flourishing organic matter than the aging period increased by 43.06 percent, Ageing lowest average total nitrogen content of the soil, it was reduced by 10.91% compared with no significant differences.(2) Compared with the natural soil, planting years increased soil easily oxidized active organic carbon and carbon pool management index, planting fruit trees flourishing time, Walnut easily oxidized organic carbon(LOC) compared with the control soil significantly higher than 140.19% and 114.02%. When the fruit is old aging period, 0-20 cm soil LOC content in soil decreased significantly when compared with the flourishing, and Walnut decline of 24.90% and 25.33%, but still higher than before the natural soil reclamation farming. With the planting years to enhance the activity of soil organic carbon, organic carbon shorten turnaround time, will help enhance the effectiveness of soil nutrients and improve soil fertility of arable land.(3) During the jujube orchard planting and Walnut,> 250μm water stable aggregates of proportion with the number of years of extended cultivation has increased, 53 ~ 250μm micro-aggregates of proportion with the number of years of cultivation delay increases, and <53μm aggregates proportion is decreasing. With the planting years show that the extension of the proportion of different particle size of soil aggregates orchards may constitute the positive direction. Jujube Orchard carbon content of different size aggregates increased first decreasing trend. Walnut >250μm water stable aggregates carbon increased with the extension of planting years, 53~250μm micro-aggregates carbon content with increasing planting years of extended, But <53μm aggregates of carbon content showed a decreasing trend after the first increment.(4) With the extension of planting years, water-soluble carbon content of the soil increased first and then decreased. 0-20 cm soil and Walnut Jujube Orchard relatively young in the flourishing period, improved 32.56% and 34.79%, compared with a significant difference, comparing the aging of the flourishing orchard soil WSOC decreased slightly decreased by 8.92 % and 10.56%, the difference was not significant.