节酸磷肥在黄棕壤性水稻土上的供磷潜力─—L值  

AGRONOMIC POTENTIAL OF PARTIALLY ACIDULATED ROCK PHOSPHATES ON A YELLOW-BROWNISH PADDY SOIL

作　　者：熊礼明[1] 时正元[1] 

机构地区：[1]中国科学院南京土壤研究所

出　　处：《核农学报》1994年第2期87-91,共5页Journal of Nuclear Agricultural Sciences

摘　　要：生长室内以剪股颖（Ａｇｒｏｓｔｉｓｔｅｎｕｉｓ）为指示植物，研究了昆阳、晋宁两磷矿中品位矿样制取的节酸磷肥（６０％酸化度）在黄棕壤性水稻土上的供磷潜力。节酸磷肥和重过磷酸钙（ＴＳＰ）处理，植株地上部３次收获的生物量没有显著差异。但植株吸磷至和Ｌ值各处理间存在显著差异。以这两个参数评价各肥料的供磷潜力，ＴＳＰ供磷能力最强，节酸磷肥其次，磷矿粉较差，但明显优于对照（未施磷）处理。两种矿样之间没有显著差异。The agronomic potential of two partially acidulated rock phosphates(PARP),SP60Kand SP60J,which were manufactured respectively from Kunyang rock phosphate(RPK)andJinning rock pkospbate(RPJ)at 60% acidulation degree,was evaluated in growth chamberusing isotopic technique with Agrostis tenuis as test plant.While the plant biomass of theabove ground part did not differ much among various treatments,the amount of phosphorusaccumulated by plants and the L value of soil had significant difference among treatments.These two parameters indicated the same sequence for the two PARP fertilizers and the twoRP materials in term of relative agronomic potential as compared to TSP are:SP60K 67%,SP60J 66%,RPK 23%,and RPJ 19%.The relative agronomic potential of the two PAPRwas almost the same as their water soluble phosphorus percentage in the fertilizer material.It suggested from the results that the unreacted phosphate rock in the PARP materials hadnot contributed to plant utilization under the experiment conditions.

关 键 词：节酸磷肥 供磷潜力 水稻土 

分 类 号：S143.22[农业科学—肥料学]