长沙县紫泥田晚稻肥料利用率研究

Fertilizer Utilization Efficiency of Late Rice in Purple Paddy Soil of Changsha County

紫泥田是长沙县典型的水稻土类型。本研究设置配方施肥区、无氮区、无磷区、无钾区4个处理,探究紫泥田晚稻肥料利用率现状。结果表明:紫泥田晚稻配方施肥处理株高、穗长、有效穗、穗总粒数、穗实粒数均显著高于缺素处理,产量增加15.16%~24.79%;晚稻氮、磷、钾肥利用率分别为41.73%、12.68%、52.49%,氮、钾肥利用率较高,磷肥利用率较低,应进一步优化施肥结构和施肥方式。

Purple paddy soil is a typical type of paddy soil in Changsha County.This study set up four treatment areas(formula fertilization area,nitrogen free area,phosphorus free area and potassium free area)to explore the status of fertilizer utilization efficiency for late rice in purple paddy soil.The results showed that the plant height,panicle length,number of effective panicle,total number of grains per panicle and number of full grains per panicle of late rice treated with formula fertilization in purple paddy soil were significantly higher than those treated with nutrient deficiency,with an increase in yield of 15.16%-24.79%.The utilization efficiency of nitrogen,phosphorus and potassium fertilizers in late rice were 41.73%,12.68%,and 52.49%,respectively.The utilization efficiency of nitrogen and potassium fertilizers were high,while the utilization efficiency of phosphorus fertilizers was low.Therefore,further optimization of fertilization structure and methods should be carried out.