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Root secretion stimulating ash growth in larch-ash mixed forest 总被引:1,自引:0,他引:1
IntroduchonRePOrt6d as early as 1920s, the groWth of ashcould be increaSed as ash was mixed with larch.However, the mechanism of allelopathic effect betwedn larch and ash has not been clearly yet. Theallelopathic ~ in mixed forest were generallyregard6d as fOllowing four wayst volatile matt6rs, rootsecredon, St6m leaching, and litter decompositionmatt6rs (Zhai 1993). This paper presented the studies on the ~ of root secretion, focused on thosestimulahon allelochemicals that can increase the… 相似文献
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笔者经过多年生产、栽培试验及反复修剪,实践证明,在冬季轻剪多缓放的基础上,采取夏季修剪技术措施促进花芽形成,取得了较理想的结果。1春季刻芽主枝和甩放的辅养枝,若不进行刻芽,只在前部发出几个长枝,中部及后部很少发出中、长果枝及短果枝,造成光杆。中心干上不刻芽,也不能在所要求的部位和方向长出2次枝。1.1春刻芽的时间及方法时间一般从3月10日到4月10日。方法:在芽尖上方用小钢锯条或刀,剪刻一月牙形切口,深达木质部,以促使分枝。1.2春刻芽应注意的问题1.2.1主侧枝及辅养枝主枝基部10厘米下的芽不刻;梢部弱芽不刻,背上芽不刻。背下及… 相似文献
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