Estimating Nitrogen Release from Organic Fertilizers for Soilless Production by Analysis of C and N Pools

Author:

Lohr Dieter1,Gruda Nazim S.2ORCID,Meinken Elke1

Affiliation:

1. Institute for Horticulture, Weihenstephan-Triesdorf University of Applied Science, Am Staudengarten 14, 85354 Freising, Germany

2. INRES—Institute of Crop Science and Resource Conservation, Division of Horticultural Sciences, University of Bonn, 53121 Bonn, Germany

Abstract

The use of organic fertilizers in soilless pot plant production has sharply increased in recent years. However, there is still a lack of methods for characterizing the N release from organic fertilizers. This bears the risk of an inadequate nutrient supply and, thus, a waste of resources. Therefore, the current research analyzed fourteen commercial organic fertilizers for various C and N pools by extraction in cold and hot water, acid hydrolysis, and thermal fractionation. Furthermore, we conducted an incubation test using a growing medium (80 vol% peat plus 20 vol% green waste compost) and fitted the nitrogen release to different kinetic models. Finally, we calculated the correlations among the best-suited kinetic model parameters and the C and N pools. The C and N pools soluble in water and weak hydrochloride acid varied significantly among the fourteen fertilizers but were closely correlated with each other. The N release from most organic fertilizers could be described very well using the Gompertz function (R² > 0.9), and the parameters of the Gompertz function showed significant correlations with the C and N pools. Hydrolyzable C and N pools provided valuable information about the N release characteristics of organic fertilizers.

Publisher

MDPI AG

Subject

Horticulture,Plant Science

Reference82 articles.

1. Organic horticulture expands globally;Granatstein;Chron. Hortic.,2010

2. Investigating consumer preference for organic, local, or sustainable plants;Yue;HortScience,2011

3. Organic agriculture in the twenty-first century;Reganold;Nat. Plants,2016

4. Willer, H., and Lernoud, J. (2017). The World of Organic Agriculture. Statistics and Emerging Trends, IFOAM-Organics International.

5. Survey of the research needs of the potential organic ornamental bedding plant industry in Maine;Burnett;HortTechnology,2009

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3