林下间种作物对杨树幼林生长量的影响

Effects of Intercropping Crops under the Tree Crowns on Growth of Young Poplar Plantation

通过在1年生、2年生辽育1号杨树幼林内间种玉米、大豆、西瓜、向日葵4种作物,研究了这些作物对杨树幼林生长量的影响。结果表明:间种不同作物对辽育1号杨树幼林生长量的影响差异较大,其中间种西瓜、大豆等矮棵作物优势更为明显,间种玉米、向日葵等高棵作物效果不如间种西瓜、大豆等矮棵作物。建议在辽西地区杨树人工林内多选择对水分需求较多的作物间种,以解决杨树生产中对水分的需求,为其丰产创造条件。

The effects of these crops on growth of young poplar trees were studied by using four crops, namely,Zea mays 9 Glycine max 〉 Citrullus lanatus and Helianthus annuus , in the young trees of 1-year-old and 2-year-old Pop- ulus 6 Liaoyu No. 1’. Result shows that the intercropping of different crops have larger significance on growth of Populus 4Liaoyu No. 1 〉the effects of intercropping of Citrullus lanatus Glycine max is significant. The effects of intercropping Zea mays and Helianthus annuus are not as good as those of Citrullus lanatus and Glycine max. Crops which demand for moisture should be selected for intercropping in poplar plantation in western Liaoning Prov-ince 〉 so as to solve the problem that the demand for moisture in the production of poplar and create the conditions for its high yield.