瘦瘠赤红壤上花生对营养要素的敏感性

The Sensitivity of Peanut with Nutritious Elements on an Infertile Laterite Red Soil

瘦瘠赤红壤栽培花生对营养要素的敏感程度依次为磷、钙、氮和钾，钼的效果不明显，而有机肥增产极显著。磷是花生生长发育的首要限制营养要素，缺磷生长极差，施磷可增产４～５倍。缺钙栽培的负效果随连作而愈显著，钙的重要性明显，施钙后５造平均增产１．４倍。首造施氮可使花生增产５０％。

The sensitive degree of peanut when applied with nutritious elements on an infertile laterite red soil was P 、Ca、N、 K respectively. Plant growth was restrained without phosphorus but plant yield could increased 4～5 times when phosphorus was applied. The plant growth gave stunted while the treatments lack of Ca or N, but the plant yield would increased up to 29% and 50% respectively if Ca or N was added in the first crop. The addition of organic manure markedly increased the plant yield to 89% on an average in four crops. 