造林保存率

hm-2，但造林保存率一般仅有10%~15%，需多次重造或补植，因此还是应用本项总结的造林技术更节省经费，造林效果好、成林快，防护效能可提前发挥。

But the preserving rate is just 10 % ~ 15 % and need replanting and reinforcement planting . So application of this planting technology can spend much money and get better results . Trees grow faster .

常规造林保存率只有5%。

Conventional preserving rate of afforestation is only 5 percent .

不同等级云杉苗木造林保存率试验结果与分析

Experiment on the Preservation Rate of Afforestation by Different Grades of Seedlings of Spruce

结果表明：①小黑杨苗期可以在小兴安岭山地安全越冬，造林保存率90%以上。

The results showed that the lesser black poplar in seedling stage could overwinter in Xiaoxing ' an Mountains , and its survival rate was above 90 % .

调查结果表明3a后造林面积保存率达100%，造林株数保存率达80%以上，生长状况优良。

The survey result showed that the preserving rate of the areas reached 100 % after 3 years , and the preserving rate of the plants reached 80 % , the growth condition performed well .

容器苗可提高干石山区造林的保存率和改善苗木翌年的生长状况；

Container seedling increased and improved growth next year of young trees in arid-stony mountain area ;

苗木规格质量与造林成活率、保存率及幼林生长的关系

Study on the relationships among seedling quality and survival rate , stocking percentage and young stand growth

由于自然条件恶劣，造林成活率和保存率低，使得生态建设和城市绿化中可供选择的树种比较匮乏。

Because of the bad natural conditions , the rate of survival is low , which caused the resources of tree species very short in the ecology construction and urban greening .

6年的试验结果表明：两种乔灌混交模式的造林成活率、保存率均较高，林木的生长状况也较好。

The results of six years experiment showed that the survival rate and preservation rate of these two patterns were all good , and the growth of trees were promising as well .

在保证造林成活率和保存率的基础上，用于整地和幼林抚育方面的经费越少，经济效益则越高。

On the base of assuring survival rate and conserving rate , the less the fee used in soil preparation and young growth tending is , the higher the economic benefit is .

其幼树期的试验结果表明：扭叶松能适应两地的环境条件，植苗造林成活率及保存率达91.3%~100%；

The growth performance of sapling stage showed that Pinus contorta could adjusted to the site conditions of the two experimental sites . The survival ratio and preserving ratio reached 91.3 % ~ 100 % .

使造林成活率和保存率提高1.1%~72.4%，苗木的成活率和保存率也随保水剂用量的增加而增加；

The survival rate and preservation rate of the seedlings treated with hydrogel increased by 1.1 % ~ 72.4 % , and the survival rate and preservation rate increased with increasing application rate of hydrogel ;

沾益县德援造林项目造林196772hm2，造林保存率924%，截至2002年底，项目的各项具体目标均已圆满完成，其中生态建设效果尤为突出。项目中采取了优化树种配置，营造混交林；

By the end of 2002 , all the individual objectives of the project including 1967.72hm ~ 2 of afforestation area and 92.4 % of survival rate have been satisfactorily achieved , in which the ecological construction effect is much prominent .

深栽造林是解决半干旱沙地造林成活率和保存率最有效的方法之一，深栽造林钻孔机是用于深栽造林最为有效的设备。

Tree deep planting is one of the best methods in semiarid sand area with high-planted tree 's survival and keeping rate .

深栽造林是一项在干旱沙地提高造林成活率和保存率的有效技术和方法。

Tree deep planting is a remarkable technology and effective method to increase the tree planting survival rate and keep rate .

生长枝与结果枝嫁接苗造林能使树体矮化，但以生长枝嫁接苗造林成活率和保存率较高。

Grafted seedlings from growing and bearing branch could lower the tree , and that from growing branch had higher planting survival rate .

通过福建中部山地引种木麻黄造林试验，5a的研究结果表明：木麻黄无性系与实生苗造林保存率都较高，分别达到98.15%和96.8%，差异不显著。

Introduction experiments of Casuarina equisetifolia in the middle part of mountain in Fujian was conducted . Five years results showed that afforestation preserving rate of clonal Casuarina equisetifolia and seedling plant were higher and reached 98.15 % and 96.8 % respectively .

结合广东番禺红树林造林的现状，对影响红树林幼苗成活率和生长状况的因素进行初步分析，并据此提出提高造林保存率的措施等。

Combined with the conditions of mangrove plantation in Panyu of Guangdong , elementary analysis on the factors affecting the survival rate and growth condition of mangrove seedlings was carried out in the research , and accordingly the measures to increase the survival rate of seedlings were proposed .

造林整地、种植深度对苗木生长量的影响较大，造林方法、造林坡向、种植深度对造林成活率和保存率的影响相对显著。

Cm on overcast slope ; ( 4 ) soil preparation , planting depth have much effects on growth , and afforestation method , slope aspect , and the planting depth effects survival rates and growth significantly .