幼龄翅荚木不同生长季节叶片营养动态研究

Study of nutrition dynamics of Zenia nsignis Chun young trees leaves in different growing periods

为了探索配方施肥对幼龄翅荚木养分的影响,以湖南省杜家冲试验林场翅夹木配方施肥试验为研究对象,于不同生长季节分别在施肥区和对照区采集土壤和叶片进行N、P、K等营养元素的动态分析,并将各生长季节叶片与土壤营养元素含量进行相关性分析。结果表明:配方施肥区翅荚木叶片营养元素含量在不同生长季节变化差异显著,其中K、P含量在生长前期、中期、后期及末期呈现先降低后升高的趋势,K含量最高达2.20%,最低为0.55%,P含量最高达0.52%,最低为0.14%,而各肥效区组间N含量的变化没有固定模式,最高达0.70%,最低为0.36%;叶片营养与相应的林地土壤营养含量线性正相关,但与本身的生长(胸径、树高)没有显著相关性。

In order to study the effect of formulated fertilization on the nutrient elements of Zenia nsignis Chun young trees leaves, the fertilization tests in Dujiaehong experimental forest farm in Hunan province were carried out, the nutrition dynamics （N, P, K and other nutrients） in the soils and leaves were analyzed in different growing seasons at the formulated fertilization and the control plot, and the correlation analyses between the leaves in differ ent seasons and the soil nutrient elements were conducted. The results show that the formulated fertilization Zenia nsignis Chun nutrient concentrations in different growing seasons were significantly different, K, P content in the growth of early, middle, late and final periods showed a trend that at the first decreased, then increased; the maximum K content went up to 2.20%, the minimum was 0.55%;the maximum P content reached 0.52%, the mini mum was0.14 %;the N contents did not change in a fixed mode at different test intervals, the maximum N content reached 0.70 %, the minimum was 0.36 % ; there was a positive linear correlation between the leaf nutrition and soil nutrient contents, but the leaf nutrition had not any significant correlation to the DBH, tree height.