000			01795nam a2200229Ia 4500
008			220216s9999 xx 000 0 und d
100			_aXiaoping W
245		0	_aEffects of application of specific formula fertilizers on rubber growth and yield in Hainan, China
260			_bIRRDB Symposium on Natural Rubber(Hevea brasiliensis) V.1- General, Soils and Fertilization and Breeding and Selection Sessions. Ho Chi Minh City, Vietnam, 14-15 October 1997,p35-44
520			_aRubber tree nutrients, soil fertility and the effects of fertilizer application were investigated in rubber plantations in Hainan, China. Based on the results, rubber associated soils in Hainan are divided into four categories: I. Deficient in phosphorus and potassium but rich in magnesium: II. Deficient in phosphorus and magnesium but rich in potassium; III. Deficient in phosphorus; and IV. Deficient in nitrogen, phosphorus, potassium and magnesium. The specific fertilizer formulae with rational ratios of N,P,K and Mg nutrients were then calculated according to the appropriate techniques for rubber tree nutrient diagnosis. Some trace elements which are benificial for rubber trees were also incorporated into the formulae. Fertilizer pellets were made according to the formulae and applied to rubber trees. Results indicated that the specific formula fertilizers had a significant benificial effect on the growth of young rubber trees and increased the latex yield of rubber trees under tapping.
650			_aFertilizer formula
650			_aFormula fertilizer application
650			_aGrowth
650			_aHevea brasiliensis
650			_aLeaf nutrients
650			_aSoil fertility
650			_aYield
700			_aShicong L
700			_aXiangdong H
700			_aXiangzheng L
942			_cJS
999			_c58287 _d58287