摘要
为了明确羊粪有机肥在豫西丘陵旱地的养分释放规律,为豫西旱地烟田施用羊粪有机肥提供理论基础,于2019年采用尼龙网袋田间原位培养的方法,研究了烟苗移栽前结合起垄施入腐熟羊粪有机肥在洛阳烟田的碳氮矿化特征及其对土壤速效养分含量和腐殖酸组分的影响。结果显示:羊粪有机肥在土壤掩埋0~15 d矿化速度缓慢,15 d后快速矿化,在75 d达到峰值,碳、氮矿化率占整个矿化掩埋期矿化量的87.81%和88.11%,75 d后矿化减弱,矿化率趋于平稳。随着羊粪有机肥掩埋天数的增加,土壤硝态氮、有效磷和速效钾含量升高,铵态氮含量降低,表明羊粪有机肥在矿化过程中有利于促进土壤的硝化作用,增强土壤的供肥能力;羊粪有机肥施入土壤还能促进土壤腐殖酸的形成和积累,在施入土壤60d后,土壤腐殖酸、富里酸、胡敏酸的含量及胡富比较对照处理明显升高。因此,豫西烤烟旱作区在烟苗移栽前提前施入腐熟羊粪有机肥,其碳氮矿化规律与烤烟的需肥要求能够较好地吻合,且有利于改善烟田土壤质量,但是羊粪有机肥矿化前期速率较慢,应与化肥搭配使用。
To clarify nutrient release characteristics of sheep manure organic fertilizer and provide theoretical basis for applying sheep manure organic fertilizer in hilly tobacco drylands of western Henan, nylon mesh bag in situ culture experiment was conducted in 2019 to study carbon and nitrogen mineralization characteristics of decomposed sheep manure organic fertilizer as well as its effects on soil available nutrient contents and humic acid composition in Luoyang tobacco drylands, in which sheep manure organic fertilizer was buried in soil ridging before tobacco seedlings were transplanted. The results show that the mineralization of sheep manure organic fertilizer is slow in 0–15 days but fast after 15 days, and mineralization rate reaches the peak at the 75 day(the mineralization rates of carbon and nitrogen are accounted for 87.81% and 88.11% of the total mineralization during the whole mineralization period), then decreases and stabilizes. With the increase of buried days, the contents of soil nitrate nitrogen, available phosphorus and potassium are increased, while the content of soil ammonium nitrogen is decreased, indicating that the mineralization process of sheep manure organic fertilizer is beneficial to promote soil nitrification and enhance nutrient supply capacity of soil. Sheep manure organic fertilizer also promotes the formation and accumulation of humus acid in soil. After 60 days of application, the contents of soil humic acid, fulvic acid and humic acid and the ratio of H/F are significantly higher than those of the control treatment. Therefore, carbon and nitrogen mineralization are in good agreement with the fertilizer requirements of flue-cured tobacco, which are also beneficial to improve soil quality when sheep manure organic fertilizer is applied before transplanting of flue-cured tobacco seedlings in the drylands of western Henan Province, but mineralization rate of sheep manure is slow in the early stage thus should be combined with chemical fertilizer.
作者
温烜琳
马宜林
马君红
王艳芳
赵世民
申洪涛
李友军
刘领
WEN Xuanlin;MA Yilin;MA Junhong;WANG Yanfang;ZHAO Shimin;SHEN Hongtao;LI Youjun;LIU Ling(College of Agriculture,Henan University of Science and Technology,Luoyang,Henan 471023,China;Technology Center,Luoyang Branch of Henan Provincial Tobacco Corporation,Luoyang,Henan 471000,China;Technology Center,China Tobacco Henan Industrial Limited Company,Zhengzhou 450000,China)
出处
《土壤》
CAS
CSCD
北大核心
2022年第5期993-999,共7页
Soils
基金
河南省重点研发与推广专项(科技攻关)(212102110286)
河南省烟草公司洛阳市公司项目(LYKJ202003,2022410300270071)
河南中烟工业有限责任公司项目(2020410001340006)资助。
关键词
羊粪有机肥
豫西旱地
矿化特征
土壤养分
腐殖酸组成
Sheep manure organic fertilizer
Dryland of Western Henan
Mineralization characteristics
Soil nutrients
Humis acid composition
