Effects of Slow Release Fertilizer Dosage on the Growth and Nutrient Content of Camellia oleifera Container Seedlings

ZHANG Zhen; ZHOU Lei; CHEN Yongzhong; ZHANG Ying; WANG Rui; MIAO Ziqi; LI Zhigang; LONG Ling; XU Yanming

doi:10.15933/j.cnki.1004-3268.2025.06.007

Abstract：This research studied the effects of slow release fertilizer dosage on the growth and nutrient content of Camellia oleifera container seedlings,aiming to determine the appropriate slow release fertilizer dosage for cultivating C.oleifera container seedlings.A randomized complete block design with a single factor was adopted in this experiment.Five treatments with different amounts of slow release fertilizer were set up,including 0 g per plant(CK),1.0 g per plant(T1),1.2 g per plant(T2),1.4 g per plant(T3),1.6 g per plant(T4).The growth and N,P and K contents of C.oleifera container seedlings were measured.The comprehensive quality of C.oleifera container seedlings was evaluated by principal component analysis.The results showed that T3 treatment had the highest seedling height,basal diameter,root dry mass,stem dry mass,leaf dry mass,whole plant biomass,root length,root surface area and root volume,which were 66.55 cm,7.11 mm,10.49 g per plant,10.37 g per plant,14.24 g per plant,35.10 g per plant,2 492.78 cm,584.92 cm2,40.96 cm3,and were increased by 23.24%,16.94%,83.71%,121.11%,85.90%,94.35%,23.21%,37.36%,129.47%compared with the CK,respectively.T3 treatment had the highest N,P and K contents in roots,stems and leaves,which were 125.03,12.59,73.74,90.40,12.75,41.95,172.40,15.81,88.60 mg per plant,and were increased by 62.80%,71.29%,59.85%,115.49%,175.38%,170.65%,133.45%,85.56%,129.12%compared with the CK,respectively.There were correlations among different nutrient contents,and between nutrient contents and growth indicators of C.oleifera container seedlings.The principal component analysis indicated that the comprehensive evaluation score of seedling quality was ranked as follows:T3>T4>T2>T1>CK.Overall,a suitable slow release fertilizer dosage could promote the growth and nutrient accumulation of C.oleifera container seedlings,with 1.4 g per plant being appropriate.