新疆农业科学2017，Vol.54Issue(8)：1523-1530,8.DOI:10.6048/j.issn.1001-4330.2017.08.019
不同种植年限紫花苜蓿和棉花轮作对土壤理化性质的影响
Effects of Different Cultivation Years Alfalfa and Rotation Cotton on Soil Physical & Chemical Properties
摘要
Abstract
[Objective] The effects of different cultivation years alfalfa and alfalfa/cotton rotation on the physical and chemical properties were studied in the Aksu area of Xinjiang.[Method] The soils were collected from 0-10 cm,10-20 cm and 20-40 cm depth from different plots,including 5 years of continuous planting of cotton field,five years alfalfa rotation planting cotton field,and planting alfalfa from 1st year to 4th year field.The soil bulk density,total salt,organic matter,total nitrogen,alkali hydrolyzable nitrogen,available phosphorus and available potassium were measured.[Result]The rotation can reduce pH.Planting alfalfa can decrease SBD.The SBD was reduced with increased alfalfa planting years.The longer the planting time,the better the SBD effect.The surface layer SBD was highest than that of other layers.The content of total salt (TS) was reduced in planting alfalfa and alfalfa rotation cotton field.The longer the alfalfa cultivation period,the more obviously the TS reduction.The TS in the fourth year of alfalfa field was decreased by 50.5％ than that of the first year alfalfa.The TS of alfalfa rotation cotton was reduced by 41.7％ than that of continuous cropping cotton.Planting alfalfa can increase the soil organic matter (SOM),the SOM was increased obviously with the increased alfalfa planting years.The total nitrogen content was highest in alfalfa/cotton rotation plot than others.The total nitrogen content of 0-10 cm soil was highest in planting alfalfa plots than those of 10 -40 cm,and 10-40 cm,total nitrogen content was not changed obviously.The alkaline hydrolysis nitrogen,available phosphorus content were highest in 4th year planting alfalfa field.The available potassium content was increased gradually with alfalfa planting years prolonged.[Conclusion] Planting alfalfa in Aksu area can significantly reduce soil bulk density,increase the soil organic matter and nitrogen content of alfalfa,and alfalfa / cotton rotation can reduce soil salinity.关键词
苜蓿/棉花/轮作/土壤盐分/理化性质Key words
alfalfa/rotation/cotton/soil/physical and chemical properties分类
农业科技引用本文复制引用
王林娜,景春梅,张玲,席琳乔..不同种植年限紫花苜蓿和棉花轮作对土壤理化性质的影响[J].新疆农业科学,2017,54(8):1523-1530,8.基金项目
现代农业产业技术体系建设专项资金资助(CARS35-44)Special Fund for the Construction of Modern Agricultural Technology System (CARS35-44) （CARS35-44）
