Assessing the impacts of experimental mid-rotation forest fertiliser treatments on water quality

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-07-21 DOI:10.33494/nzjfs542024x356x
B. Baillie, J. Elleouet, Graham W. R. Coker
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Abstract

Background: Planted forests face on-going challenges to increase productivity while remaining within sustainable limits. Forest management activities that potentially impact on water quality are under increasing public scrutiny and regulatory controls. New Zealand’s forest industry is experimenting with aerially applied, mid-rotation fertiliser treatments as a sustainable option to increase productivity from planted forests. However, the effect of such applications on water quality requires investigation. Methods: Field trials were established to assess the effects of two conventional fertiliser applications (either granular di-ammonium phosphate (DAP) or granular urea) and a new-to-forestry liquid foliar fertiliser blend, on nitrogen and phosphorus concentrations in stream water of three planted forest sites representing a range of New Zealand climatic and soil environments. Results: Overall, the liquid foliar fertiliser treatment had the least impact on water quality compared with the two conventional fertiliser treatments. On the day of fertiliser application, when compared with pre-treatment in-stream concentrations, the urea treatments resulted in short-term increases in total nitrogen. The DAP treatment increased total phosphorus and dissolved reactive phosphorus concentrations with peak concentrations declining within hours. In the post-application period, any increases in nutrient concentrations in stream water were mainly associated with rainfall events within six months of application and at one site, the resumption of stream flow following a dry spell. Riparian ‘no-spray’ buffers of varying widths assisted in mediating the impacts of fertiliser applications. Conclusions: Initial evidence from these trials indicates that mid-rotation fertiliser treatments have the potential to provide an alternate management option to increase forest productivity or disease resilience with minimal or only short-term effects to water quality. However, further research on their environmental effects would support the development of guidelines specific to mid-rotation fertiliser applications, particularly if mid-rotation fertiliser applications become standard management practice in the forest industry.
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评估试验性中期轮伐森林肥料处理对水质的影响
背景:人造林在提高生产力的同时也面临着可持续发展的挑战。对水质有潜在影响的森林管理活动正受到越来越多的公众监督和监管控制。新西兰的森林产业正在尝试在轮伐中期进行航空施肥处理,作为提高人工林生产力的一种可持续选择。然而,这种施肥方法对水质的影响需要调查:方法:进行了实地试验,以评估两种常规施肥(颗粒状磷酸二铵(DAP)或颗粒状尿素)和一种新的森林液态叶面混合肥料对代表新西兰不同气候和土壤环境的三个人工林地点溪水中氮、磷浓度的影响:总的来说,与两种常规肥料处理相比,液体叶面肥处理对水质的影响最小。施肥当天,与处理前的水流浓度相比,尿素处理会导致总氮短期内增加。磷酸二铵处理增加了总磷和溶解性活性磷的浓度,峰值浓度在数小时内下降。施药后,溪水中养分浓度的增加主要与施药后 6 个月内的降雨事件有关,在一个地点还与干旱后溪水恢复流动有关。不同宽度的河岸 "无喷洒 "缓冲区有助于减轻施肥的影响:这些试验的初步证据表明,轮伐中期施肥有可能为提高森林生产力或抗病能力提供另一种管理选择,而对水质的影响极小或仅有短期影响。然而,对其环境影响的进一步研究将有助于制定专门针对中耕施肥的指导原则,尤其是在中耕施肥成为林业标准管理做法的情况下。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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