新疆150团农田防护林胁地效应研究

通过在试验示范区布设试验,采集数据,对新疆150团农田防护林胁地效应进行研究,结果表明:根胁地对棉田的影响范围为10～12m;在棉花耕作层范围内,随着测点由靠近林带向棉田中部延伸,土壤含水率逐步增高;东、西、南、北4个方向林带对棉花产量都有明显影响,减产幅度在28.0%～68.2%,减产幅度最大的为南侧林带。提出了胁地解决对策:(1)解决农田防护林灌溉问题;(2)开挖断根沟;(3)机械深翻;(4)胁地范围内适宜作物搭配。林带虽对农作物产生明显的影响,只要采取一定的技术措施或在胁地范围内种植苜蓿等耐阴饲草及作物,可将损失降低到最低程度。

Soil-coerced Effect of Farmland Shelterbelt of Xinjiang 150 Regiment

The soil-coerced effect of farmland shelterbelt in XJnjiang 150 Regiment is studied through experiment ＆ collected data. Result show that： in the range of 10 m-12 m from the sbelterhelt,the cotton output is decreased because of root negative-influenoe; the soil water content goes up gradually with the increase of the distance from the shelterbelt to the central of cotton field; the shelterbelt at the 4 directions （ east, west, south, north） d farmland all cause obviously the yield reduction of the cotton;the scope of cotton yield reduction is 28.0%-68.2%, and among them the highest yield reduction range occurred in the south side of the shelterbelt. Soil-cocrced solving countermeasures were put forword ： （ 1 ） farmland shelterbelt irrigation problem; （2） digging root-cutting ditch; （ 3 ） deep ploughing tillage by using machine; （ 4 ） suitable crop combination in the soil-cocrced range. Although the crop was significantly affected by the shelterbelt,the loss of yield will reduce to a minimum by using technical measure or planting shade-tolerant plant or crop in the soil-coerced range, such as alfalfa and so on.