【摘要】 本文研究在湖北省宜昌县山地黄棕壤上以磷肥为底肥单施锌、硒肥及氮锌硒肥配合施用对单播与混播黑麦草中锌营养状况的影响。试验结果表明 :单施锌肥明显增加混播黑麦草 (混播比例为白三叶∶黑麦草为 1∶4)中的锌含量 ,且随施锌量的增加 ,混播黑麦草中的锌含量也增加 ;单施磷肥的处理与不施肥的对照相比较 ,混播黑麦草中的锌含量降低 ,其主要原因是干物质量增加引起的稀释效应。单施硒肥情况下 ,混播黑麦草中的锌含量随着施硒量的增加呈降低趋势。氮锌硒肥配合施用的 9个处理中 ,混播黑麦草中锌含量最高的处理是N46Zn2 5Se1 ;单播黑麦草中锌含量最高的处理是N30Zn2 5Se5。更多还原

【Abstract】 A pot experiment was carried out to study the effect of zinc or selenium fertilizer applied alone,combined application of nitrogen,zinc and selenium fertilizer on zinc nutrition of ryegrass in mono culture or in mixed culture in mountain yellow\|brown earth of Hubei province.The result showed that:①Zn content was enhanced by mixed culture(white clover∶ryegrass=1∶4),at the same time,Zn content of ryegrass in mixed culture was increased with increasing of Zn fertilizer.②The main reason of Zn content of ryegrass decreased in mixed culture was dilution effect due to the increase of dry weight.③In mono\|Se treatment,Zn content of ryegrass in mixed culture was decreased with increasing of Se fertilizer.④In 9 treatment of combined applications of N,Zn and Se fertilizer,treatment of the highest Zn content of ryegrass in mixed culture was N46Zn25Se1;treatment of the highest Zn content of ryegrass in mono culture was N30Zn25Se5.更多还原