施肥对红花油茶生长与土壤养分的影响

Effects of Fertilization on Growth and Soil Nutrients of Camellia chekiangoleosa

针对浙江红花油茶低产林改造过程中肥料配比不当、施用过度等问题,探讨复合肥配施生物有机肥对改造林分生长及土壤养分的影响。以寿宁县和霞浦县经过全伐改造后的浙江红花油茶低产林为研究对象,各设置5种施肥处理及对照(CK),测试浙江红花油茶生长和土壤养分变化对各施肥处理的响应。白鹇墓试验地树高和冠幅增长显著,为12.7 cm和12.9 cm,开花量最多可达293朵·株^(-1),速效磷、速效氮和速效钾分别是CK的1.5倍、1.6倍、2.4倍;八斗丘试验地树高和冠幅最高可达12.9 cm和14.0 cm,开花量最多为370朵·株^(-1),速效磷、速效氮和速效钾分别是CK的1.7倍、1.3倍、1.8倍。各施肥配比均能促进浙江红花油茶生长,增加土壤养分含量,中低水平配比的施肥量更适合其生长。本研究为提高林下自然籽播更新林分产量、改良浙江红花油茶土壤肥力提供了有益的参考。

To explore the effects of compound fertilizer combined with bio-organic fertilizer on the growth and soil nutrients of low-yield forest Camellia chekiangoleosa the low-yield forest C.chekiangoleosa forest in Shouning County and Xiapu County after full cutting transformation were taken as the research objects.Five fertilization treatments and control(CK)were set up to test the response of growth and soil nutrient changes of C.chekiangoleosa to each fertilization treatment.The tree height and crown width of Baixianmu test site increased significantly,which were 12.7 cm and 12.9 cm.The maximum flowering amount was 293 flowers per plant.The available phosphorus,available nitrogen,and available potassium were 1.5 times,1.6 times,and 2.4 times higher than CK respectively.The tree height and crown width of Badouqiu experimental site can reach 12.9 cm and 14 cm,and the maximum flowering amount is 370 flowers per plant.The available phosphorus,available nitrogen,and available potassium are 1.7 times,1.3 times,and 1.8 times of CK respectively.All fertilization ratios can promote the growth of C.chekiangoleosa,and increase the content of soil nutrients.The fertilization ratio of medium and low levels is more suitable for its growth.This study provides a useful reference for improving the yield of natural seed sowing and regeneration stand under the forest and improving the soil fertility of C.chekiangoleosa.