平茬高度对砂生槐萌蘖的影响

砂生槐(Sophora moorcroftiana)是西藏一江两河地区农牧民的传统薪柴。为了合理经营砂生槐薪炭林,2012年11月,选择西藏拉萨北山封育10年的砂生槐灌丛设置试验地,研究3种平茬高度(0 cm、10 cm、20 cm)对砂生槐萌蘖、萌枝生长及生物量的影响。结果表明:萌蘖数量从大到小的排序为20 cm平茬10 cm平茬0 cm平茬;单个萌枝的生长(长度、基径)0 cm平茬10 cm平茬20 cm平茬。生物量从大到小的排序为10 cm平茬0 cm平茬和20 cm平茬。经营砂生槐薪炭林,为了获得较多的薪柴,建议采用距地面10 cm平茬。

Effects of Flat Stubble Height on Sprout Tillers of Sophora moorcroftiana

Sophora moorcroftiana is a traditional firewood of Tibetan peasants and herdsmen along the region of the ＂one river and two streams＂. In order to obtain a high efficiency of the fuel-wood forest, experimental field has been set up since Nov 2012 in Sophora moorcroftiana forest of ten year old, North mountain of Lhasa Tibet, and the influence of three stumps in the height of 0cm, 10cm, 20cm on the sprout tillers of the Sophora moorcrofiiana, regeneration of sprout and the amount of biomass also have been studied. The result shows： the amount of the sprout tillers is followed as 20cm stump 〉 10cm stump 〉 0cm stump. The length and basal diameter of a singular sprout is 0cm stump 〉 10cm stump 〉 20cm stump. The order of the biomass is 10cm stump 〉0cm stump or 20cm stump. To get more new fuel, the abovel0cm height of flat stubble is recommended.