控释肥对薄壳山核桃容器苗营养生长的影响

Vegetative growth of containerized Carya illinoensis seedlings with controlled release fertilizer

研究了2种控释肥(APEX 19-6-12和APEX 14-14-14)在低、中、高(2、6、10 g/L)质量浓度下对薄壳山核桃容器苗营养生长的影响。结果表明:控释肥对苗木生长具有促进作用,但因肥料配方和施用质量浓度不同而异;10 g/L APEX 14-14-14和6 g/L APEX 19-6-12的处理下,苗木品质指数最高,分别为0.26和0.30;除10 g/L APEX 19-6-12处理外,所有的控释肥处理均显著促进了苗木生长停滞期的营养生长,茎体积日增量在7月中旬和8月下旬达到两个高峰,分别是32.6 mm3/d(6 g/L APEX 14-14-14)和20.7 mm3/d(6 g/L APEX19-6-12);N、Ca含量均与肥料配方和施肥质量浓度相关,相同质量浓度下APEX19-6-12处理的苗木营养元素含量高于APEX 14-14-14处理;K含量仅受控释肥配方影响,Mg含量则既不受配方影响也不受施用质量浓度的影响;除了K外,其它3种元素在植株各器官中的分配均不受控释肥配方的影响。

The effects of two kinds of controlled release fertilizer(APEX 19-6-12 andAPEX 14-14-14)with low, moderate and high mass concentrations (2, 6 and 10 g/L, respectively) on were evaluated for their effects on the vegetative growth of containerizedCarya illinoensisseedlings were investigated. The results show that the controlled release fertilizer had promoter action on the seedling growth of containerized C. illinoensisseedlings, and promoter actions varied with the changes of prescription and concentration of fertilizer applied; With the treatments of 10 g/L APEX 14-14-14 and 6 g/L APEX 19-6-12, the quality indexes of nursery stock reached the highest, the values were 0.26 and 0.30; The vegetative growth (stem volume current increment) of pecan seedlings during stagnated period were obviously improved, the stem volume daily increment had two high peaks in mid-July and late August, being 32.6 mm3/d (6 g/L APEX 14-14-14) and 20.7 mm3/d (6 g/L APEX19-6-12), respectively; The N and Ca contents were affected by both prescription and concentration of fertilizer applied, under the same mass concentrations, the seedling nutrient content with the treatment of APEX 19-6-12 was higher than that of APEX 14-14-14 treatment; the K content was significantly affected by the prescription, while Mg content was not affected by relationship with the two factors. Except for K, distribution of other mineral elements neither was affected by the influence of prescription not by influence of mass concentration; Except K element, the allocationof other three elements in various organs of plants were not affected by the prescription of controlled release fertilizer.