论文部分内容阅读
一、造成银杏低产、衰老的原因 1、缺肥银杏树尤其是桂果树,需肥量较大,缺肥会造成银杏树未老先衰,当年不能抽生新枝条,或抽条很短,叶片小且黄、薄,花芽分化少,白果产量、质量下降。 2、土壤管理粗放土壤板结,通透性差,银杏根系生长不良,吸肥吸水能力弱,导致枝叶生长不良,白果产量减少,树体早衰。
First, resulting in low yield of ginkgo, the reasons for aging 1, lack of fertilizer Ginkgo biloba tree, especially the need to large amount of fat, lack of fat will cause ginkgo tree is not old before the decline, then can not pump new branches, or pumping a very short, Small and yellow leaves, thin, flower bud differentiation, ginkgo production, quality decline. 2, soil management Extensive soil compaction, poor permeability, poor growth of ginkgo roots, absorption of water absorption capacity is weak, leading to poor growth of branches and leaves, ginkgo production decreased, premature aging tree.