赤红壤表土育苗施石灰后施P、Zn、B对巨桉苗生长的影响

Effect of Lime,P,Zn and B Nutrients on Growth of Eucalyptus grandis Seedlings on Latored Surface Soil

赤红壤表土育苗施石灰后施Ｐ、Ｚｎ、Ｂ对巨桉苗生长的影响＊仲崇禄关键词巨桉石灰施肥苗木对巨桉（ＥｕｃａｌｙｐｔｕｓｇｒａｎｄｉｓＨｉｌｅｘＭａｉｄｅｎ）苗营养研究国内外有些报道［１～５］，但未见有关对巨桉施石灰调整土壤酸度后再施肥的报道。热带地区的赤红...

In greenhouse,7 nutrient treatments were conducted on latored soil (Ga) and humus latored soil (Bg),with Eucalyptus grandis Hill ex Maiden.The 7 treatments were CK(no nutrients,control),L(only lime),LP(=L+P),LZn(=L+Zn),LB(=L+B),LPZn(=L+P+Zn) and LPZnB(=L+P+Zn+B).The results showed that there were significant differences in seedlings heights( H ),diameter( D 0 ) and biomass production between the 7 treatments,and between the interactions of nutrients and soil type.Except(shoot+stem) or root biomass of LZn in Ga soil,and diameter of LZn or LB treatments in Bg soil,there were significant differences in other indexes( H,D 0 and biomass) between 6 nutrient treatments and CK.In Ga soil,the H/D 0 rates in whole treatments with P nutrient were all less than those of CK treatment;in the opposite,the rates in L,LZn and LB treatments were all more than those of CK treatment.In Bg soil,the H/D 0 rates in whole treatments were all less than those of CK treatment.Based on H,D 0 ,biomass above ground,root biomass and total biomass,by the Multiple Objective Strategic Decision Analysis methods,treatments were optimized and ordered from the excellent to the poor:LPZn>LPZnB>LP>L>LB>LZn>CK in Ga soil; LPZnB>LPZn>LP>L>LZn>LB>CK in Bg soil.When using the surface soil to grow Eucalyptus grandis seedlings,it is necessary to apply P,lime,lime+P,lime+P+Zn and/or B to soil.Finally,distribution relationships among different parts of biomass were described in the two types of soils.