南迪诺白三叶营养需求沙培试验的初步研究

以沙为栽培基质，南迪诺白三叶为指示植物，开展了氮、磷、钾、钙、镁、硫、铜、锌、锰、硼、铁、钼十二种必需元素肥的沙培肥效试验。结果表明，南迪诺白三叶对氮、磷、钾、锌、镁的缺乏较敏感，其次为硼，对钙、硫、铜、锰、铁、钼的施用不敏感，所以在单一地种植南迪诺白三叶时，除了考虑土壤的肥力和各种矿质元素含量，一定要重视磷、钾、锌、镁、氮肥的供给，其次为硼肥，可不考虑硫、铜、锰、钼元素肥的施用。

PRELIMINARY STUDY ON THE NUTRITION REQUIREMENT OF WHITE CLOVER (TRIFOLIUM REPENS CV.LADINO)GROWN IN SANDY MEDIUM

The projective of paper was to determine the nutrition requirement of white clover(Trifolium repens cv.Ladino) by application of twelve element fertilizers viz.Nitrogen(N),phosphorus(P),potassium(K),calcium(Ca),magnesium(Mg),sulphur(S),copper(Cu),zinc(Zn),manganese(Mn),boron(B),iron(Fe) and molybdenum(Mo) in sandy medium.The results showed that the growth of Landino displayed Iow biomass yield,branches and roots for lack of N,P,K,Zn,Mg and B,respectively.However,the growth of Ladino yielded high biomass,braches and roots whether or not application of Ca,S,Cu,Mn,Fe and Mo,respectively.According to the soil fertility and the level of necessarily mineral element,the fertilizers of P,K,Zn,N and B applied must be emphasized and S,Cu,Mn and Mo need not requirement for the growth of Ladino in order to obtained high yield of a white clover grown in different soil.