Conservation and improvement of the sanctuary forests for Japanese monkeys and sika deers.

1.梅花鹿森林的保护与改良。千叶县博索山野生动物保护区梅花鹿的密度很高，导致森林地面植被变得贫瘠。为了改善野生动物的栖息地，在千叶东京大学森林的试验田设置了防梅花栅栏。(1)在Higasinosawa试验地块的情况下。在安装防麦草栅栏16个月后，栅栏内的针叶栎树最高高度为113 cm，栅栏外的针叶栎树最高高度为54 cm。栅栏外，除了梅花鹿无法食用的新林（Neolistea sericea）外，所有乔木的枝条都高度下降或死亡。围栏内适口树种的立木产量为118 g/m^2，围栏外为1 g/m^2。(2)以Mazawa试验田为例。（150）围篱后10个月内，围篱内的苗木密度、种数和植被盖度分别是围篱外的8倍、3倍和15倍。围栏内可食用部分的直立产量为40 g/m^2，围栏外的直立产量为6 g/m^2。日本猴子保护区的改善。对千叶县基图市高山山更新试验田植被变化进行了5年的研究。本试验的目的是建立由针叶林向阔叶林转化的方法。每公顷阔叶树的幼苗有7000多棵，是在对针叶林进行全面砍伐后发芽的。在采伐后的4 ~ 5年内进行清理处理，形成了可以为猴子提供多种食物的阔叶林。

1.Conservation and improvement of the forests for Sika deers. The density of sika deer is so high that the ferest floor vegetation become poor in a wildife preservation area of Boso Mounains, Chiba prefecture. In order to improve the habitatfor the wildlife, sika-proof fence were installed at the experiment plot in Tokyo University Forests in Chiba.(1)In the case of Higasinosawa experiment plot.In sixteen months after installing sika-proof fence, the maximum coppice shoot of Quercus acuta in the fence was 113 cm hight, and that outside the fence was 54 cm high. Outsuide the fence, all coppice shoots decreased in height or died, except for Neolistea sericea i.e. the unpaletable species for sika deer. The standing crop of palatable species was 118 g/m^2 in the fence, while that was 1 g/m^2 outside the ence.(2)In the case of Mazawa experiment plot. (150)In ten months after installing sika-proof fence, the density of seedling, nummber of species and vegetation coverage in the fence were eight times, three times and fifteen times, respectively, as compaired with those outside the fence. The standing crop of palatable part was 40 g/m^2 in the fence, while that was 6 g/m^2 outside the fence.2.Improvement of the sancturary forest for Japanese monkeys.The changes of vegetation of the regenration experiment plot in Mt. Takagoyama, Kimitu City, Chiba Prefecture, were studied for 5 years. The purpos for the experiment is to establish the method of conversion from coniferous forest to broad-leaved forest. More than 7,000 seedlings of broad-leaved trees per ha sprouted after the clear cutting of coniferous forest. By a clearing treatment in four to five years after clear cutting, the broad-leaved forest that has possibility to supply monkeys with many food were made.