NITROGEN AND POTASSIUM FERTILIZERS IN THE PRODUCTION OF ROOTSTOCKS UMBU TREE (Spondias tuberosa Arr. Cam.)

被引：0
作者：
De Andrade, Miguel Wanderley [1 ]
Mendonca, Vander [1 ]
Hafle, Oscar Mariano [2 ]
Queiroz De Medeiros, Priscilla Vanubia [1 ]
De Medeiros Mendonca, Luciana Freitas [1 ]
机构：
[1] Univ Fed Rural Semi Arido, Dept Ciencias Vegetais, BR-59625900 Mossoro, RN, Brazil
[2] Inst Fed Ciencia & Tecnol, Sousa, PB, Brazil
来源：
REVISTA CAATINGA | 2013年 / 26卷 / 04期
关键词：
Spondias tuberos; Fertilization; Nitrogen; Potassium;
D O I：
暂无
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The objective of this work was to obtain information about the best sources and doses of nitrogen and potassium fertilizers for obtaining vigorous rootstocks umbuzeiro in Northeastern Brazil. In separate experiments, we tested two sources of nitrogen, urea and ammonium sulfate and five N rates (0, 350, 700, 1400 and 2800) mg. dm(-3), and two sources of potash fertilizer (potassium chloride and potassium sulfate) in five doses of K20 (0, 1.800, 3.600, 5.400 and 7.200) mg. dm(-3) substrate. The experimental design was in randomized blocks in factorial 2 (sources) x 4 (doses), with ten treatments and four replications and ten plants per plot. Parameters were evaluated for the growth of seedlings. Doses of nitrogen and potassium applied to soil had a negative influence in the survival of seedlings, shoot length, stem diameter and root fresh weight of seedlings.
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页码：117 / 122
页数：6
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