油松塑料大棚容器育苗及造林技术

来源 :陕西林业科技 | 被引量 : 0次 | 上传用户:kar123
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
采用塑料大棚容器育苗能够缩短育苗周期,促进壮苗培育,提高造林成活率,加速造林进度,降低育苗成本,便于逐步推广育苗工厂化和造林机械化.对于地势高、气候干旱寒冷、生长期短的黄土高原应用塑料大棚育苗是提高造林质量的有效措施.
其他文献
Adsorption of divalent metal ions,including Cu^2+,Pb^2+,Zn^2+,Cd^2+ and Ni^2+,on quartz surface was measured as a function of metal ion concentration at 30℃und
Microbes were cultured and identified from the saples collected at various depths in 4 weathering profiles of REE-bearing granites in Gonghe,Guangdong,The micro
Two types of enclaves occur in magmatic plutons in Tongling,Anhui.Enclaves of the first type are residuals of metamorphic rocks of high amphibolite facies,and t
The rhyolites in the upper Lueliang Group of Shanxi,China,are Paleoproterozoic weakly alkaline volcanic rocks.They are characterized by high,SiO2,NaO+K2O,Zr,Nd,
In recent years,the X-ray spectrometer has been devekloped not only just in enhancing resolution,but also towards dynamic analysis.Computer modeling processing,
The Xiannushan and Jiuwanxi are the two major fracture belts adjacent to the Three Gorges Dam Site,ALpatites are selected from fracture clay and fracutre-cliff
枇杷是国内外市场上的热销珍稀水果,风味独特,营养丰富,冬花夏果,四季常青,除绿化、美化环境外,发展枇杷可给山区群众带来较好经济收入.近年来,结合山川秀美、退耕还林工程的
柿树是我国主要木本粮食树种之一,栽培面积遍及全国20多个省(区)市.柿树适应性广,管理较为容易,结果早,收益期长.当前,在柿树栽培中普遍存在着管理粗放,病虫危害严重,品质下
研究结果表明,在造林时对未能提前菌根化的苗木进行补充接种可以提高油松造林的成活率,促进苗木的生长,这种促进作用主要表现在对苗木的地径生长和地下部分的鲜重方面.对不同