梅州沙田柚结果树的叶片营养特点研究

NUTRITION CHARACTERISTICS IN LEAVES OF FRUIT- BEARING TREES OF CITRUS GRANDIS IN MEIZHOU

摘要:

研究了梅州沙田柚两个果园的土壤养分、结果树营养叶片不同生育时期的矿质元素含量及季节性动态变化情况和各元素的相互关系。结果表明,柚树根际土壤养分正常树和退化树相比没有明显差别,营养叶中的各元素在不同的生育时期含量均不同,且退化树各元素在各生育期的变化与正常树相近。各元素的年周期变化规律不同,说明沙田柚在不同的生育时期对各元素的需求量及它们之问的需求比例有不同要求。可见,树体内各营养元素间的关系存在着相互促进和相互抑制的复杂作用。

Abstract:

The soil nutrients, the contents and seasonal dynamics of mineral elements as well as the relationship among the elements in leaves of fruit-bearing trees of Citrus grandis Osbeck cv. Shatianyou in Meizhou were studied. Results show that there was no obvious difference in rhizospheric soil nutrients between normal trees and retrogressive trees, but the coments of various elements in leaves in different fruiting period were different. The change in various elements in the retrogressive trees in fruiting