冀西北高原还林地林带间水分动态与资源适度利用研究

Studies on water dynamic among belt of stands on the returned forestland and resource moderately used in the northwest plateau of Hebei province

针对冀西北坝上还林地间作的4种模式,对林带间水分进行监测研究。结果表明:4龄榆树与林带间荒草地耗水量差异不显著;林带间作大豆、苜蓿、小南瓜使得远林带点耗水量分别高于林带间荒草地5.2、11.6、20.0 mm,近林带点差异不显著;间种作物未影响幼林的生长,且能获得较好的经济产值;还林地间作小南瓜,不仅可通过瓜蔓郁蔽效应改善林带土壤水分,而且可获得当地主栽作物1.85倍的经济产值,是一生态-经济效益兼顾的幼林地资源适度利用范式。

For the 4 intercropping patterns in Bashang of Hebei province, water dynamic of space among forest belt were studied. The results showed that the water consumption between 4 years old elms and forst had no obviously difference. Planting soybean, medic and pumpkin among the forest belt,the water consumption was higher than the CK about 5.2,11.6 and 20.0 mm. Intercropping not only had no difference on the gsowth yield of elms, but also produced better economic value. Intercropping pumpkin in space among elms belt can obviously improve the soil water which is near the young plantation, the output value of the intercropping was i .85 times higher than naked-oats of Bashang plateau. The technology considering both ecological benefit and economic benefit can be an example to use the resource of young plantation moderately.