砒砂岩沟坡沙棘人工林的生长结实规律  

Growth & Fructification Regularity for Hippophae rhamnoides Plantation in Gully Slope of Feldspathic Sandstone

作　　者：胡建忠[1] 殷丽强[1] 杜文嫣[1] 郭海[1] 

机构地区：[1]水利部水土保持植物开发管理中心,北京100083

出　　处：《防护林科技》2011年第4期1-3,共3页Protection Forest Science and Technology

基　　金：晋陕蒙砒砂岩区沙棘生态工程(水规计[1998]111号)

摘　　要：砒砂岩沟坡种植的沙棘人工林,10年后平均树高向2.5~3.0 m趋近,地径近8 cm,沙棘纯盖度在60%、植被总盖度在70%左右。位于当地条件较好沟谷地的沙棘,树高达5 m多、地径在10 cm以上。对于裸岩沟坡来说,目前的10年生沙棘人工林的树高、地径、盖度已接近其生长上限值,特别是沙棘盖度,在超过60%后,应及时平茬（间伐）,人为调节其盖度。在沙棘定植株之间,由于条件逐步改善,适宜于这种新的生态条件的当地乡土植物会继续侵入,群落会更加稳定,植被总盖度增加至90%也是可容许的。沙棘单株产果量与林龄之间的关系不大,产果量并没有随着林龄的增加而增加,主要随年降水量或灌溉量的增加而增加。中国沙棘单株产果量随年降水量的变化趋势,以净增加1.5倍的斜率增加。中国沙棘和大果沙棘灌溉后的产果量,均相当于不灌溉的3倍以上。Averaged tree height,ground diameter,pure coverage total vegetation coverage of H.rhamnoides are respectively nearly 2.5-3.0 m,8 cm,60% 70% or so after 10 a.In the good site condition like gully bed,the largest height ground diameter may reach above 5 m 10 cm.For the naked area of the feldspathic sandstone area,the tree height,ground diameter coverage of 10 years＇ H.rhamnoides forest have got to the maximum ones.Especially for the coverage of H.rhamnoides being more than 60%,it is time to stump（thinning）.Because H.rhamnoides plantation produced a good site which can be used for indigenous plant invading gradually,the total vegetation coverage should be increased by 90%.Fruit field of H.rhamnoides,which doesn＇t relate to the forest ages,increase with the increase of the precipitation or irrigated amounts.Fruit yield of Chinese seabuckthorn per plant increase with the net increase being 1.5 times slope with the variation trend of annual precipitation.Fruit yield for Chinese seabuckthorn large berry cultivars of seabuckthorn after irrigation are above 3 times the yield of them without irrigation.

关 键 词：砒砂岩 沟坡 沙棘 人工林 生长 结实 

分 类 号：S793.1[农业科学—林木遗传育种]