沸石对土壤养分生物有效性和土壤化学性质的影响研究

Effect of natural zeolite on soil nutrient bioavailability and soil chemical properties

在花岗岩发育的赤红壤上进行的天然沸石混施化肥的盆栽试验研究结果表明 ,沸石提高了土壤养分的生物有效性 ,显著促进玉米的生长 ,增加玉米的生物量和提高了玉米对N、P、K的吸收量 .15N示踪技术表明 ,沸石处理可以显著提高氮肥的利用率 ,两造玉米最高的氮肥利用率分别比对照提高了 2 8.8%和 60 .0 % .土壤的分析结果表明 ,沸石处理也可提高土壤阳离子交换量、盐基饱和度和土壤 pH值 .

Pot experiment with haplic feralsol derived from granite in South China showed t hat compared with no zeolite treatment,applying zeolite with nitrogen,phosph a te and potassium fertilizers could markedly promote the growth of corn,increase its biomass,and raise the uptake of nitrogen,phosphorus and potassium.Field expe riment with 15 N showed that zeolite could promote the nitrogen utiliza tion efficiency by 28.8～60.0%,and raise soil CEC,BS and pH.