【摘要】 对不同树龄银杏植株体内矿质养分动态进行监测的结果表明 ,银杏叶中 N、P、K等元素的含量随季节变化而呈规律性变化 ;银杏地上部各器官对养分的积累 ,未挂果树为叶 >新枝 ,丰产银杏 N的积累为叶 =果实>新枝 ,P、K的积累为果实 >叶 >新枝 ;展叶期叶片中积累的养分量较大 ;对不同养分的需求比例 (N∶ P2 O5∶K2 O)分别为三年生幼树 2～ 3∶ 1∶ 2～ 3、五年生树 4～ 5∶ 1∶ 6～ 8、丰产银杏 2∶ 1∶ 4;每 kg果实含 N 3 .80 g、P2 O54 .42 g、K2 O1 2 .99g,其比例为 1∶ 1∶ 3。更多还原

【Abstract】 The variation of mineral nutrient concentrations in Ginkgo biloba L. was surveyed. The result indicates that concentrations of N, P, K in Ginkgo leaves vary regularly with the change of the growing season. In all its organs above ground, the accumulation of N, P, K in leaves are all higher than that of the new shoots in the non-bearing trees. For the high-yield trees, the accumulation of N in leaves is as high as in the fruits, and higher than that in the new shoots, but the accumulations of P, K are fruits>leaves>new shoots. The accumulation of the nutrient in the leaves in the stage of the leaf unfolding is very high. For the ratio of nutrient requirement of the plant, the N∶P 2O 5∶K 2O is respectively 2～3∶1∶2～3 in three-year-old trees, 4～5∶1∶6～8 in five-year-old trees , and 2∶1∶4 in the high-yield trees. In 1 kg fruits, it contains 3 80g N, 4 42 g P 2O 5 and 12 99 g K 2O, the N∶P 2O 5∶K 2O is 1∶1∶3.更多还原