摘要
通过田间小区试验,研究不同施氮量对杭白菊养分积累、转运及产量的影响,以确定杭白菊最佳氮肥用量。试验设5个处理,氮素用量分别为0、90 kg/hm2、120 kg/hm2、150 kg/hm2、180 kg/hm2,以N0、N1、N2、N3、N4表示,5次重复。结果表明,不同氮素用量影响杭白菊不同时期干物质和养分的阶段积累量,但不影响其积累趋势,整个生育期内杭白菊氮、磷、钾积累量为钾〉氮〉磷。不同施氮量影响茎叶氮、磷、钾的转移效率和在不同器官中的分配比率,以不施肥处理最高,N3（150 kg/hm2）次之。在氮、磷、钾三种元素中,转运效率磷〉氮〉钾。收获期氮、磷、钾在不同器官的分配比率不同,氮素、钾素分配比率为茎〉花〉叶〉根,磷素分配比率为茎〉花〉根〉叶。各处理杭白菊花的产量在1746.232~211.3 kg/hm2之间,以N3（150 kg/hm2）处理产量最高。在本实验条件下,杭白菊的推荐施氮量为150 kg/hm2。
Aimed to determine the optimal N application rate,a series of field trials were carried out to investigate the effects of different N application rates on the yields,nutrient distribution and nutrient transformation in Chrysanthemum morifolium.Five N application levels： 0 kg/ha（N0）,90 kg/ha（N1）,120 kg/ha（N2）,150 kg/ha（N3）and 180 kg/ha（N4）were set up with five replications.The area of each plot was 0.8 m×15 m.The results indicated that different N application rates significantly affected dry matter and nutrition accumulations at different growth stages,but did not affect the tendency of accumulation.The order of the accumulation of N,P and K throughout the whole growth period was： KNP.N application rates affected transfer efficiency and distribution ratio of N,P and K in different organs.The highest transfer efficiency and distribution rate was found in N0 followed by N3.The order of transfer efficiency of N,P and K was： PNK.At the deflowering stage,the distribution rates of N and P was： stemflowerleafroot,but the distribution of K was： stemflowerrootleaf.The yield was ranged from 1746.23 kg/ha to 2211.3 kg/ha,the highest yield was found in N3（150 kg/ha）.Under this experimental conditions,the recommended N application for Chrysanthemum morifolium was 150 kg/ha.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2010年第4期992-997,共6页
Journal of Plant Nutrition and Fertilizers
基金
国家"十一五"科技支撑计划项目(2006BAD10B07)资助
关键词
杭白菊
氮
磷
钾
积累
转运
Chrysanthemum morifolium
nitrogen
phosphorus
potassium
accumulation
transformation
