LIU Chunhua,XIE Fu,WANG Yang,et al.Response of Seedling Growth Characteristics to Different Levels of Phosphorus in Two Species of Walnut[J].Northern Horticulture,2020,44(12):25-32.[doi:10.11937/bfyy.20194399]
两个种源地核桃实生幼苗生长特性对不同磷水平的响应
- Title:
- Response of Seedling Growth Characteristics to Different Levels of Phosphorus in Two Species of Walnut
- Keywords:
- walnut seedling; phosphorus levels; growth; leaf tissue anatomy; root morphology
- 文献标志码:
- A
- 摘要:
- 以和田与阿克苏当地核桃种质的实生幼苗为试材，采用直播建园的方法，研究了不同磷水平下（0、7、14、21、28 g?株-1）2个种源地核桃实生幼苗的生长量、叶片组织解剖结构和根系形态特征的影响。以期为核桃幼苗磷肥的高效利用提供参考依据。结果表明：以核桃的生长量及叶片解剖结构状况来看，和田核桃种质在磷水平为14 g?株-1的生长量达到最大，阿克苏核桃种质在7 g?株-1的生长量达到峰值。土壤磷水平的上升能明显促进根系的生长和发育，但超过核桃磷素最佳适应点后，对核桃的生长起明显的抑制作用。和田与阿克苏核桃种质分别在磷水平为14 g?株-1和7 g?株-1达到最适点，根系的总长度、总表面积、总体积、平均直径、总根尖数等指标均最大。磷水平为14 g?株-1和7 g?株-1的条件下分别有利于和田与阿克苏核桃实生幼苗种质的生长、叶片组织解剖结构及根系的生长发育。磷水平过高或过低均不利于核桃实生幼苗的生长和发育，其中低磷胁迫条件下比高磷胁迫条件下的抑制作用较弱，说明核桃实生幼苗与较高磷环境相比更适于在低磷环境中生长。
- Abstract:
- The seedlings of Khotan native walnut germplasm and Aksu native walnut germplasm were used as research materials.The effects of different phosphorus levels（0、7、14、21、28 g per plant）on walnut rootstocks from two provenances were explored.The growth，leaf anatomical structure and root morphological characteristics of walnut seedlings in two sources were studied by direct seeding method.The optimum phosphorus application rate of walnut seedlings from two sources was obtained，which provided a theoretical basis for the efficient use of phosphate fertilizer in walnut seedlings.The results showed that from the perspective of the growth of walnuts and anatomical structure of the leaves the Khotan walnut germplasm had the highest growth rate of 14 g per plant，and the growth of Aksu walnut germplasm reached 7 g per plant.The increase of soil phosphorus level could significantly promote the growth and development of roots，but it could significantly inhibit the growth of walnuts after the walnut adapts to the best adaptation point of phosphorus.The Khotan and Aksu walnut germplasms were at the optimum point of phosphorus supply level of 14 g and 7 g per plant，respectively.The total length，total surface area，total volume，average diameter，total root tip number and fractal dimension of the roots were the largest.Under the conditions of phosphorus supply level of 14 g and 7 g per plant，the growth，leaf tissue anatomy and root growth of Khotan and Aksu walnut seedlings were beneficial.The high or low phosphorus level was not conducive to the growth and development of walnut seedlings.Under low phosphorus stress，the inhibition was stronger than that under high phosphorus stress，indicated that walnut seedlings were more suitable for low phosphorus environment.
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备注/Memo
第一作者简介：刘春花（1992-），女，硕士研究生，研究方向为果树栽培。E-mail：1765537488@qq.com.责任作者：张锐（1979-），女，博士,教授，博士生导师，现主要从事核桃高产栽培及分子育种等研究工作。E-mail：zhrgsh@163.com.基金项目：第一师阿拉尔市科研课题计划资助项目（2017YY20）；兵团师域（区域）发展创新支持计划资助项目（2017DB001）。收稿日期：2020-03-09