Effects Of Potassium Levels On Nutrient Accumulation, Fruit Yield And Oil Content Of Camellia Oleifera

Camellia oleifera is one of four woody edible oil species in the word, in addition tobeing superior edible oil, but also has a high utilization value, in recent years, the demandof domestic market is very prosperous. but its cultivation and nutrient management levelremains to be improved, especially due to lack of soil potassium regression in recent years.Therefore, the study of balanced fertilization combined with efficient management ofpotash fertilizer in the planting of other technologies is very necessary. The test was on thebasis of camellia balanced fertilization, taken Camellia in Jiu jiang hai hui as researchobject, and measured N,P,K content indicators of rhizosphere soil, leaves and fruit, In thecertain condition of nitrogen fertilizer, phosphate fertilizer, combined with the generationof interaction between nutrient on yield and oil rate in different potassium treatments.Evaluated comprehensively the effect of potassium on nutrient accumulation, the qualityand the yield of Camellia oleifera. The results were as follows:（1）Effects of rhizosphere soil available N and available K content had significantdifference on Camellia oleifera in different potassium levels, but the content of availablephosphorus in soil was not obvious. The change of nutrient content in rhizosphere soilincreased first and then decreased with the potassium fertilizer increased. But the nutrientaccumulation were not exactly the same of the second half, The content of K2and K3treatment were higher, in general, the K2and K3treatments were more advantageous tothe soil nutrient accumulation and be absorbed by plants than that of the control (CK),potassium deficiency treatment (K0), low potassium (K1) and high potassium (K5) in thetest base of Camellia oleifera.（2）Different levels of potassium treatments in response to nutrient of leaves was different.NPK content in leaves generally higher than the old leaves, which the total potassiumcontent of leaves was between3.02~4.35g.kg-1, was about2times the phosphorus contentin leaves, but only about0.5times the nitrogen content in leaves. The nutrient content ofNPK in leaves with middle level K3treatment was higher, followed by K4and K5, andwere higher than the treatment of CK, K0and K1. In addition to the accumulation of totalnitrogen content in the leaves in May by K1and K2treatment was better, may be nitrogenhas not been fully revealed in a short time.（3）The appropriate amount of potash fertilizer combined with nitrogen and phosphorusfertilizer had an increased effect on the fruits of NPK in a certain. Different fertilizer onfruit of total N and total K accumulation were significantly different, but the impact on thetotal P content was not significant. The fruit nitrogen content of K2treatment was thehighest, the mean content was12.76g.kg-1, respectively increased by31%,20%,17%,2%,11%and18%than CK, K0, K1, K2, K4and K5, the total P content of K3treatment wasbetter, the average content was3.40g.kg-1, the total K content was between6.09g.kg-1~7.03g.kg-1, compared with other treatments could better improve fruit nutrientaccumulation. （4）With increase of potassium, Camellia oleifera fruit yield and oil content increased atfirst and then decreased. In2012and2013,the test area of Camellia oleifera per plantyield under K3treatment for3741g/strain,3033g/strain and the oil content as the427.60g/strain,369.72g/strain reached the highest, than the other treatments was helpful toimprove the quality and the production.（5）Nutrient accumulation under the potassium level had a certain impact of each factoron the yield and quality of Camellia oleifera, but not the same size and ways. Camelliaoleifera yield and available P, available N, available K in soil regression equation betweenis: Y=-2584.031482+41.08092268X1-129.72887229X2+26.653056632X3. Thecorrelation coefficients of R=0.9548**. The leaf potassium effect on fruit oil content wasthe most significant in leaf nutrient factors, the regression equation is:Y=-6.51106073+5.022526125X3.The correlation coefficients of R=0.8929**. The directeffect of fruit total potassium content of fruit oil content was up to0.8716.（6）Combined with appropriate potash and nitrogen fertilizer on Camellia oleiferawoodland between nutrient accumulation, was inextricably linked between yield andquality. Potassium levels between its nitrogen and potassium nutrient accumulationnonlinear quadratic parabolic relationship, potassium and phosphorus nutrientaccumulation level nonlinear quadratic parabolic relationship between the two was notobvious, the accumulation of total phosphorus nutrient potash by exogenous the impactwas not significant.