【摘要】 采用PVC管为模拟运动场的基础构造,研究控释氮肥对运动场草坪颜色、均一度、生长速度、地上生物量的影响以及模拟超量降雨条件下收集的淋洗液硝酸盐动态变化情况。研究结果表明:控释氮肥养分释放速率最低、肥效最长,与尿素相比可改善运动场草坪的外观品质;控释氮肥抑制草坪草过分生长,减少运动场草坪的修剪次数,控释氮肥通过控制氮素的释放减少氮肥淋失,降低水体硝酸盐污染和富营养化。更多还原

【Abstract】 By simulating basic structure of stadium with PVC pipe,effects of controlled release nitrogen fertilizer on color,uniformity,sward growth rate,the biomass above the ground,the nutrient dynamic change of collected leaching liquid under the simulation ultra quantity rainfall condition were studied.The result showed: Among all examined fertilizers,the nutrient release rate of urea was the highest and that of controlled release nitrogen fertilizer was the lowest.Effects of controlled release nitrogen fertilizer last the longest and that of urea last the lowest.Compared with urea,controlled release nitrogen fertilizer can improve the appearance quality of the stadium lawn.It could restrain lawn grass excessive growth,reduce the number of times of pruning of the stadium lawn,increase economic efficiency;through controlling the plain release of nitrogen,the nutrient loss was reduced,nitrate pollution and excessive nourishment of nitrate in water body were decreased.更多还原