Study On The Rational Fertilizer Application To Camellia Oleifera Abel

This experiment selected Liuyang City oil-tea camellia production base for field fertilizationexperiment. The effect of different N, P, K and microelement fertilizer on the growth, yield andquality was studied. This experiment offered rational fertilization for oil-tea and it would promotethe development of the poplar estate faster. The results obtained were showed as follows:1. Height growth significantly improved after fertilization. The influence sequence to youngoil-tea height growth was N>K>P>microelement, and to mature oil-tea height was N, P, K andmicroelement. The influence sequence to the crown sizes was N, P, K and microelement.2. Leaves chlorophyll content was remarkably improved under different fertilizationtreatments. The effect of fertilization on young oil-tea camellia leaf C_aand C_bwas significant,and fertilization improved the leaf C_bcontent and reduced C_acontent.3. Fertilization played an important role on improving photosynthetic performance of oil-tea.Pn and Gs of young oil-tea were improved under different fertilization treatments, and Ci and Trwere not obvious. The photosynthetic rate of mature oil-tea in improved after fertilization, andthe influence sequence was N>P>K>microelement.4. Nitrogen, phosphorus, potassium content of leaves significantly improved under differentfertilization treatments, and fertilization could delay leaf nutrition elements reduction.5. The yield of oil-tea obviously increased at fertilization conditions. The treatment with N(174g/tree), P (500g/tree), K (133g/tree), Zn (10g/tree) significantly influenced the yield ofyoung oil-tea, and influence sequence of fertilizer was N>P>K>microelement. The treatmentwith N (435g/tree), P (833g/tree), K (112g/tree), Zn (10g/tree) significantly influenced the yieldof mature oil-tea, and influence sequence of fertilizer was P>N>K>microelement.6. Fruit weigh, each500g fresh seeds, fresh seed content, dry seed content, dry kernelcontent were not significantly different under different fertilizer levels, and the rate of oil contentin kernel was significant different. The influence sequence to young oil-tea oil content in kernelwas N>P>K> microelement, and mature oil-tea oil content in kernel was P>N>K> microelement.7. The optimum level of fertilizing to young oil-tea was: urea:111.70~164.12g/tree;superphosphate:519.82~621.55g/tree; potassium sulfate:81.36~103.22g/tree. The optimum levelof fertilizing to mature oil-tea was: urea:111.70~164.12g/tree; potassium sulfate81.36~103.22g/tree; superphosphate:519.82~621.55g/tree.