摘要
腐殖酸是一种廉价无污染的有效肥料基质,广泛存在于褐煤、风化煤、泥炭和草炭中。腐殖酸具有多种活性基团,有利于土壤团粒结构形成,改善土壤结构,提高土壤保墒能力,还可增强土壤阳离子交换能力,调节土壤pH值,
The effects of humic acid application on biomass of I-107 Populus euramericana,soil nutrients and enzyme activity were studied under regular-and higher-fertilized level with a potting experiment.The result showed that：The application of humic acid with inorganic fertilizers significantly increased the root,stem and leaf biomass of I-107 P.euramericana,and among them the increase of root biomass was the most by 58.60%.Addition of humic acid also increased the nitrogen,phosphorus and potassium nutrient contents in the poplar by an average of 5.35%,25.52%,and 25.06%,respectively,therefore,the contents of soil available phosphorus and available potassium were lowered.Compared with inorganic fertilizer,the addition of humic acid also decreased the content of nitrate nitrogen,increased the content of ammonium nitrogen,total C,humic acid and fulvic acid,as well as the ratio of humic acid to fulvic acid.Under regular and higher-fertilized,application of humic acid increased urease activity by 24.71% and 5.83%,respectively,enhanced polyphenol oxidase activity by 21.05% and 46.34%,respectively,but had little effect on catalase activity.To sum up,application of humid acid with inorganic fertilizers had significant effects on nutrient absorption of the poplar and soil fertility.
出处
《林业科学》
CAS
CSCD
北大核心
2011年第9期158-161,共4页
Scientia Silvae Sinicae
基金
山东省农业重大应用技术创新课题“杨树超高产栽培关键技术研究”
山东省农业科技成果转化项目“经济林木腐殖酸缓释肥的中试与示范”
山东大学科技攻关“杨树丰产林郁闭林分的水肥管理措施及根系营养调控研究”项目资助
关键词
腐殖酸
I-107欧美杨
土壤
酶
养分含量
humic acid
Populus×euramericana cv.＇74/76＇
soil
enzyme
nutrition content
