关键词: 地温, 地温, 年际和年代际变化, 气候突变, Mann-Kendall检验

Abstract: For discussing the distribution ratio of dry material, N, P, K, Ca, Mg, Cu, Zn, Fe, Mn, S, B, Mo and Cl between the leaves and branches of new-born mulberry branches, a mulberry variety‘Nongsang No.14’is taken as the study material. Through studying the response of distribution ratio of dry material and the 13 nutrient elements between leaves and branches to space location, the authors found that: the proportion of nutrient distribution between leaves and branches was the amount of dry material or nutrients of leaves when the branches produced 1 g of dry matter or nutrients, the performance was Mn> Fe> B> Mo> N> Ca> Mg> Zn> K> S> Cl> P> Cu> dry material. Except Mg, dry matter and the other 12 nutrients showed that upper leaves had significant advantages in resource allocation. However, the distribution ratio of Mg in leaves and branches of mulberry was relatively stable. These results suggest that the supply of magnesium fertilizer should be appropriately increased according to the theoretical fertilization amount, and the other 12 nutrient elements should be reduced appropriately in the growth period of mulberry branches.