柞杨定植后,每年长高4～6米,1米高处周长增加20～25厘米,5年成材时达0.5～0.7立方米。伐后可再生新树,长势较强,不必重栽,节省人力、物力和财力,用在中西部意义更大。而欧美杨107、108、109,中林杨2001、2005、2050等伐后再生树第一年尚可,第二年长势骤弱,不如重栽。现将柞杨的伐后再生技术简述如下: 1.伐后促芽。采伐宜在秋季落叶后到翌年春发芽前进行,有利于再生。伐后清理一下树墩周围的杂物,并松土(深25厘米)、浇水(每墩5公斤)、施肥(每墩尿素0.25公斤)。春季产生的成丛再生芽长到15厘米时疏去弱芽,只留一壮芽,此为定苗。注意定苗宁晚勿早,以免影响成活成长。 2.励苗管理。定苗后,原有根系吸收养分面积较大,长势迅猛,同时出现二次生丛生芽,要全部抹掉,以利快长。经 After oak Yang colonization, the annual growth of 4 to 6 meters, 1 meter height perimeter increased by 20 to 25 cm, 5 years when the material reached 0.5 to 0.7 cubic meters. Renewable after cutting new trees, growing stronger, do not have replanted, save manpower, material and financial resources, with a greater significance in the Midwest. The Europe and the United States Yang 107,108,109, forest in 2001,2005,2050 after cutting the first year of regeneration tree is acceptable, the second year of weakness, it is better replant. Now oak Yang regeneration technology after the cut is as follows: 1. Cutting after the sprout. Cutting should be carried out after the fall leaves to the spring of next spring, conducive to regeneration. Clean up debris around the stump after cutting and loosen soil (25 cm deep), watering (5 kg per pier) and fertilize (0.25 kg per pier urea). Regeneration into a bunch of clumps of spring buds grow to 15 cm sparse to weak buds, leaving only a strong bud, this is Dingmiao. Note Ding Mian rather late, so as not to affect the survival and growth. 2. Li Miao management. Dingmiao, the original root absorption of nutrients larger area, rapid growth, while secondary Cong Cong buds, to be erase all to facilitate faster growth. through