Nutrition Diagnosis Of Eucalyptus Plantations In Southern Fujian

Surveyed of the mountains of southern Fujian soil fertility conditions and eucalyptus plantations nutrient content of leaves, according to soil classification standards, organic matter content is in the low of middle; nitrogen in the low of standards; phosphorus absence or in a serious shortage; uneven distribution of total potassium, which accounted for about 30% of the high levels and low around 50%. However, potassium in the low or lack of state; calcium and magnesium content low; copper content of adequate; zinc in uneven distribution; B is more a lack of and the majority of the forest soil is general lack of.On the plants of Eucalyptus tail of each component of the elemental analysis results, in the sticks, poles, bark, leaves, to leaf nutrient content among the highest. Nutrient uptake from the point of view, to the maximum uptake of nitrogen, and other nutrient uptake were Ca> K> Mg> P> Zn> B.With the Twice general rotation design approach, set up 4 factors and 5 levels about calcium and magnesium phosphate, urea, compound fertilizer, B fertilizer four kinds of fertilizer in eucalyptus plantation within the fertilization experiment results show that: compound fertilizer application can continue to improve the growth of the amount of in eucalyptus plantations can effectively improve the use of fertilizer timber accumulation; B fertilizer can enhance the growth of the amount of fertilizer at 30 grams Borax can reach the best results, continue to increase the amount of B fertilizer application, and will not promote growth; calcium and magnesium phosphate and urea is only +100g reached 350 grams or more shall enter into force when it has obvious promoting lower than the combination of the growth-promoting ineffective. And obtain the maximum yield of the initial fertilizer ratio as follows:500 grams per plant application of calcium magnesium phosphate, urea 200 grams,500 grams of fertilizer, B fat 30 grams.Calculated by the optimal nutrient concentration method, suitable range of N (19.097-24.984 g.kg-1), P (0.803-1.132 g.kg-1), K (20.514-30.566 g.kg-1), Ca (0.951-2.843 g.kg-1), Mg (0.929-1.663 g.kg-1), Cu (5.313-7.043 mg.kg-1), Zn (19.102- 27.898 mg.kg-1), B (9.979-12.8994 mg.kg-1) has been set up. It can be used for diagnostic leaf nutrient standards, and also be combined with a variety of biomass used to calculate the nutrient uptake rate of fertilization.Additionally, the vector diagram analysis method to analyze the leaves of different fertilization treatments and the interaction of nutrients antagonistic effect, the results with the optimal concentration method is closer.