Caroline Farias Barreto, L. Antunes, R. Navroski, Jorge Atílio Benati, L. V. Ferreira, G. Nava
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引用次数: 1
摘要
摘要本研究旨在评价不同施钾剂量下桃树的生产参数,确定土壤和桃树叶片中钾元素的临界水平。该实验于2016年、2017年和2018年在巴西南大德州莫罗雷东多的一个商业果园进行。分别以0、40、80、120和160 kg ha-1 K2O作为氯化钾施于桃树的土壤表层。在为期3年的研究中,评估了单株产量、果实数量、果实质量和果实直径,并收集了土壤和叶片样品进行化学分析。桃园施钾可增加0 ~ 20 cm土层中该养分的含量。土壤施钾可提高桃树叶片钾含量。桃树生产力对土壤施钾有响应,但对平均果实质量没有影响。相对生产力与土壤钾含量之间的临界水平无法确定,桃树产量与叶片钾含量之间的临界水平为2.84%。
Potassium fertilization and its impact on production and mineral composition of peach trees
Abstract This study aimed at evaluating production parameters of peach trees subject to different doses of potassium fertilization and at establishing the critical level of this nutrient in the soil and in peach tree leaves. The experiment was conducted in the 2016, 2017 and 2018 seasons in a commercial orchard located in Morro Redondo, Rio Grande do Sul state, Brazil. Peach trees of the cultivar Sensação were fertilized at the following doses: 0, 40, 80, 120 and 160 kg ha-1 K2O as potassium chloride applied to the surface of the soil. In the 3-year study, production per plant, number of fruit, fruit mass and fruit diameter were evaluated while soil and leaf samples were collected to undergo chemical analyses. Potassium fertilization in peach orchards increases levels of this nutrient in the 0-20 cm soil layer. Potassium fertilization via soil increased potassium contents in peach tree leaves. Productivity of peach trees responds to superficial potassium application via soil but it does not affect mean fruit mass. The critical level between relative productivity and potassium content in the soil could not be established while the one between production and potassium content of leaves of peach trees was 2.84%.