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Lesnoy Zhurnal

Cultivation of Spruce Plantations Using Modern Herbicides without Agrotechnical Weeding

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A.B. Egorov, A.M. Postnikov, A.A. Bubnov, L.N. Pavluchenkova, A.N. Partolina

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Abstract

Uncontrolled development of unfavorable vegetation during artificial reforestation reduces survival and growth rates of planted trees, and in some cases causes their death. The use of reforestation equipment is often extremely difficult, therefore the most promising solutions are those involving creation of spruce plantations using seedlings with closed roots and manual planting tools without preliminary mechanical tillage. Long-term protection of plantations from undesirable vegetation is ensured by the use of modern herbicides registered for use in the forest sector in the Russian Federation. The article presents the results of 3-year field experiments on the use of herbicides and their mixtures to supress undesirable vegetation in the first years after planting European spruce (Picea abies (L.) Karst.) in the Leningrad region. High efficiency of herbicides for long-term suppression of shrubs, and herbaceous and woody plants was found. A mixture of herbicides Roundup, WS (360 g/L lyphosate acid), Anchor-85, WDG (750 g/kg sulfometuron-methyl potassium salt) and Arsenal, WC (250 g/L imazapyr) inhibited the development of herbaceous weeds for at least two growing seasons. The processes of undesirable vegetation development after spraying plantations with herbicides, the reaction of seedlings to the use of chemicals, indicators of conditions and growth of conifers were also studied. Analysis of the obtained data proved the possibility of combining a protective chemical pretreatment with herbicides and planting seedlings in a single technological procedure or planting seedlings within a few months after chemical treatment, which significantly reduces the risk of damage to seedlings by herbicides. The survival rate of plantations created by planting one- or two-year-old seedlings with closed roots was 93–98 %; and the biometric indicators were such that spruce plants could successfully compete with undesirable vegetation. The application of the developed method ensures a substantial reduction in labor and other reforestation costs compared to traditional technologies nvolving preliminary mechanical tillage and subsequent agrotechnical weeding of plantations.

Authors

Alexandr B. Egorov, Doctor of Agriculture; ResearcherID: G-4300-2015, ORCID: https://orcid.org/0000-0003-2624-214X
Anton M. Postnikov, Candidate of Agriculture; ResearcherID: G-4313-2015, ORCID: https://orcid.org/0000-0002-8942-8155
Alexander A. Bubnov, Candidate of Agriculture; ResearcherID: E-1666-2015, ORCID: https://orcid.org/0000-0001-5716-3503
Lidiya N. Pavluchenkova, Candidate of Agriculture; ResearcherID: G-4285-2015, ORCID: https://orcid.org/0000-0001-8884-2496
Anna N. Partolina, Candidate of Agriculture; ResearcherID: C-9983-2015, ORCID: https://orcid.org/0000-0003-2594-5003
e-mail: herb.egorov@yandex.rucucule88@gmail.coma.bubnov@list.rupartolina.anna.spb@gmail.com

Affiliation

Saint Petersburg Forestry Research Institute, Institutskiy prosp., 21, Saint Petersburg, 194021, Russian Federation

Keywords

forest plantations, planting, spruce, seedlings, herbicides, herbicide mixtures, chemical treatment

For citation

Egorov A.B., Postnikov A.M., Bubnov A.A., Pavluchenkova L.N., Partolina A.N. Cultivation of Spruce Plantations Using Modern Herbicides without Agrotechnical Weeding. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 3, pp. 9–23. DOI: 10.37482/0536-1036-2021-3-9-23

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Cultivation of Spruce Plantations Using Modern Herbicides without Agrotechnical Weeding

 

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