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巴彦淖尔盟河套灌区,有着发展杨树速生丰产用材林和丰产型渠道林的很大潜力。营造这些林种对苗木的质量要求较高,按以往常规育苗方式每亩扦插3000多株,能勉强出圃的合格苗只有10％左右,其主要原因是育苗密度过大,培育的苗木是径高生长比例失调的细弱苗。解决这一问题,必须降低育苗密度,扩大苗木在生长期内的营养面积,以保证苗木的出圃质量。
Bayannur League Hetao irrigation area, with the development of poplar fast-growing timber forest and high-yielding channel forest great potential. To create these kinds of forest seedlings of higher quality requirements, according to the conventional method of nursery stock cuttings per acre more than 3000 strains, barely out of nursery qualified seedlings only about 10%, the main reason is the nursery density is too large, nursery stock diameter is high Growth ratio of the weak seedlings. To solve this problem, we must reduce the density of nursery stock and expand the nutrition area of nursery stock during the growth period so as to ensure the nursery stock quality.