摘要
利用打顶与适度摘叶，调控植物顶端优势，建立新的生长平衡，能提高植物产量，改进品质，在生产上已被广泛应用。但在半干旱地区，沙棘生长期短（5个月），在常年连续受干旱胁迫、冬季严寒和风沙侵袭下，打顶摘叶虽能促进当年沙棘的生长和发育，但对次年生长产生了严重伤害，新梢密度下降25．5％～48．7％；枝重下降17．9％～25．1％，造成减产与早衰。因此，对沙棘雄株打顶与摘叶时间应在6月～7月中旬，摘叶强度应控制在25％以内，应禁止从雌株采叶。
By topping and leaf-picking moderately, regulates plant apical dominance, establishes new growth balance, improves quality, and raise the plant output, has been widely applied in the production. But in the semi-arid regions, seabuckthorn vegetal period short （5 months）, in year to year continuously subject to drought stress, winter cold and wind and sand invasion, pinches off and picks the leaf can improve the growth in those years, but has the injure severely to next year growth, and the density of new tree top dropped 25.5%-48.7%; and the branch weight dropped 17.9% 25.1%, resulte in the underproduction and the early aging. So the time of pinches off and picks the leaf to seabuckthorn male plant should in mid-June-July, and the intensity of picks leaf should in 25 %, and should forbid from the female plant to pick the leaf.
关键词
沙棘雄株
打顶
摘叶
顶端优势
叶
枝
seabuekthorn
male plant
topping
leaf picking
apical dominance
leaf
branch
