{"title":"Fertility Indicators of Haplic Luvisol of a Sour Cherry Orchard Associated with Application of Nitrogen and Potassium Fertilizers","authors":"T. A. Roeva, E. V. Leonicheva, L. I. Leontieva","doi":"10.3103/s0147687423060054","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of annual application of urea and potassium sulfate on the most important agrochemical properties of the soil root zone has been evaluated in a field experiment in a sour cherry orchard. The soil of the orchard is medium-loamy Haplic Luvisol with initially favorable parameters: pH<sub>KCl</sub> 5.8 and high humus content, (3.58–4.57%). Since 2017, fertilizers have been applied annually in early spring according to the following experiment design: 1) control (no fertilizers), 2) N30K40, 3) N60K80, 4) N90K120, and 5) N120K160. Soil samples have been collected from the soil layers of 0–20, 20–40, and 40–60 cm in 2017 (the first year of experiment) and in 2022 (6 years of fertilization). The annual application of fertilizers for 6 years led to a significant increase (by 1.4–2.2 times) in the content of exchangeable potassium in the soil layer of 0–20 cm with a constant humus content in the entire root zone. At the same time, an increase in acidity and loss of calcium has been noted in the upper layers of the soil fertilized in doses of N60K80 or more. For the period 2018–2022, the highest total yield of Turgenevka sour cherry trees was in the variant with the application of N60K80 and N120K160 (35.5 and 36.5 t/ha, respectively); however, relative to the control (29.3 t/ha), this increase is insignificant. Thus, the loamy Haplic Luvisol with favorable agrochemical characteristics can maintain stable soil fertility conditions and ensure the growth and fruiting of sour cherry trees without the additional use of fertilizers for 8 years after planting.</p>","PeriodicalId":501690,"journal":{"name":"Moscow University Soil Science Bulletin","volume":"19 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Moscow University Soil Science Bulletin","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3103/s0147687423060054","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
The effect of annual application of urea and potassium sulfate on the most important agrochemical properties of the soil root zone has been evaluated in a field experiment in a sour cherry orchard. The soil of the orchard is medium-loamy Haplic Luvisol with initially favorable parameters: pHKCl 5.8 and high humus content, (3.58–4.57%). Since 2017, fertilizers have been applied annually in early spring according to the following experiment design: 1) control (no fertilizers), 2) N30K40, 3) N60K80, 4) N90K120, and 5) N120K160. Soil samples have been collected from the soil layers of 0–20, 20–40, and 40–60 cm in 2017 (the first year of experiment) and in 2022 (6 years of fertilization). The annual application of fertilizers for 6 years led to a significant increase (by 1.4–2.2 times) in the content of exchangeable potassium in the soil layer of 0–20 cm with a constant humus content in the entire root zone. At the same time, an increase in acidity and loss of calcium has been noted in the upper layers of the soil fertilized in doses of N60K80 or more. For the period 2018–2022, the highest total yield of Turgenevka sour cherry trees was in the variant with the application of N60K80 and N120K160 (35.5 and 36.5 t/ha, respectively); however, relative to the control (29.3 t/ha), this increase is insignificant. Thus, the loamy Haplic Luvisol with favorable agrochemical characteristics can maintain stable soil fertility conditions and ensure the growth and fruiting of sour cherry trees without the additional use of fertilizers for 8 years after planting.
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