施用不同配比N、P、K肥延长沟叶结缕草绿期的试验研究  

Experiment on Prolonging the Green Duration of Manilagrass by Fertilizing Fertilizers with Different Ratio of N,P and K

作　　者：冯锡振 王加真[2] 

机构地区：[1]浙江省丽水市南明山景区管理委员会,浙江丽水323000 [2]丽水学院园林系,浙江丽水323000

出　　处：《安徽农业科学》2008年第12期4970-4972,共3页Journal of Anhui Agricultural Sciences

基　　金：浙江省农业科技攻关项目资助(2005C22079)

摘　　要：[目的]实现沟叶结缕草在亚热带地区的四季常青。[方法]在9月26日1、0月11日1、0月26日对沟叶结缕草施用不同配比的N、P、K肥,考察其生长指标。[结果]施肥能增加沟叶结缕草植株高度,10月11日施肥效果好。9-10月施N、NP、NK、NPK肥可增加草坪绿叶数,增幅达73%-137%。施用不同配比N、P、K肥可增加枯叶生物量,早施肥处理的枯叶生物量比迟施肥处理多。随着施肥时间的推迟,各处理绿叶生物量呈减少趋势。地上部绿枯比接近1.0时施肥延长草坪绿期的效果最好。施肥处理草坪图象的G值都增大,10月11日施肥处理的最大。[结论]10月上旬是沟叶结缕草施肥的最佳时期,同时施N、P、K肥效果最好。[Objective] The study aimed to realize the evergreen of manilagrass in subtropical area.[Method] On Sep.26,Oct.11 and 26,manilagrass was fertilized with fertilizers with different ratios of N,P and K to investigate its growth indices.[Result] Fertilization could increase the plant height of manilagrass and the effect of fertilization on Oct.11 was good.During Sep.~Oct.,the fertilizations of N,NP,NK,NPK fertilizers could increase the green leaf number of lawn and the increment reached 73%～137%.The application of fertilizers with different ratios of N,P and K could increase the biomass of withered leaves and that of early fertilization treatment was more than that of late fertilization treatment.As the fertilization date delayed,the biomasses of green leaves in various treatments showed reducing trend.When the ratio of green leaf to withered leaf on the aerial part approached 1.0,the effect of prolonging the green duration of lawn by fertilization was best.The G values of lawn images in fertilization treatm ents increased and were biggest in the fertilization treatment on Oct.11.[Conclusion] Early Oct.was the optimum period for the fertilization on manilagrass and the effect of applying fertilizers of N, P and K at the same time was best.

关 键 词：沟叶结缕草 氮肥 磷肥 钾肥 绿期 绿枯比 

分 类 号：S688.4[农业科学—观赏园艺]