NITROGEN RATE, CULTIVAR, AND WITHIN-ROW SPACING AFFECT COLLARD YIELD AND LEAF NUTRIENT CONCENTRATION

被引：8

作者：

DANGLER, JM ^{[1
]}

WOOD, CW ^{[1
]}

机构：

[1] AUBURN UNIV,ALABAMA AGR EXPT STN,DEPT AGRON & SOILS,AUBURN,AL 36849

来源：

HORTSCIENCE | 1993年 / 28卷 / 07期

关键词：

BRASSICA-OLERACEA (ACEPHALA GROUP); FERTILIZER; PLANT NUTRITION; PLANT POPULATION; VEGETABLE NUTRITION;

D O I：

10.21273/HORTSCI.28.7.701

中图分类号：

S6 [园艺];

学科分类号：

0902 ;

摘要：

Collards (Brassica oleracea L. Acephala Group) were grown in spring and fall to evaluate the effects of N fertilizer rate (0, 56,112,168, and 224 kg.ha-1), cultivar (Blue Max and Vates), and within-row spacing (15,23, and 30 cm) on yield and leaf mineral nutrient concentrations. Season, cultivar, and N rate interacted in their effects on yield. In spring, 'Blue Max' yield increased linearly with N rate to 10.4 t.ha-1, whereas the highest 'Vates' yield (7.0 t.ha-1) was obtained with 112 kg N/ha, and yield remained similar with additional N. In fall, 'Blue Max' and 'Vates' yields were highest (14.5 and 9.9 t.ha-1, respectively) with 112 kg N/ha. Leaf N and P concentrations increased quadratically and linearly, respectively, in response to N rate. Maximum yields were obtained with the 15-cm within-row spacing. Leaf N concentration increased linearly with increased plant population. The adequacy of the present sufficiency range for leaf Ca concentrations of field-grown collards is discussed.

引用

页码：701 / 703

页数：3

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