The aim of this study was to assess the agronomic performance and costs of slow release fertilizers and fertigation in the production of sugarcane and passion fruit seedlings in tubes. Two experiments were carried out simultaneously, one with sugarcane seedlings (SP80-3280) obtained from stalks with one bud (4 cm) and the other with passion fruit (FB-300) from seeds. Both experiments were conducted in 200-cm 3 tubes filled with composted pine bark-based substrate, with six treatments: (1) control; (2) standard fertilization (g 100 L −1 of substrate), (NH 4 ) 2 SO 4 (300) + KCl (200) + magnesium thermophosphate (200) + Osmocote® 15-9-12 Plus (600) + Osmocote® 19-6-10 Mini-Prill (600); (3) Osmocote® 15-9-12 Plus (600 g 100 L −1 of substrate); (4) Osmocote® 19-6-10 Mini-Prill (600 g 100 L −1 of substrate); (5) complete fertigation (g 100 L −1 of water), Ca(NO 3 ) 2 (80) + KNO 3 (50) + MgSO4 (35) + (NH 4 ) 3 PO4 (10) + ConMicros® Standard (2.5); and (6) macronutrient fertigation, equal 5. except ConMicros®. The results were as follows: (1) sugarcane (70 days) and passion fruit (52 days) seedlings were larger in the fertilized than control tubes; (2) standard fertilization, Osmocote® Mini-Prill, or Osmocote® Plus produced sugarcane and passion fruit seedlings with greater mass; (3) fertigations were the most inexpensive fertilizations; and (4) the slow release fertilizer Osmocote® 19-6-10 Mini-Prill presented larger seedlings, but it cost more (2–3 times) than fertigation. Substrate fertilization is essential for sugarcane and passion fruit seedlings’ production in tubes because the substrate itself is not able to provide enough nutrients for seedling development, and although standard fertilization and slow release fertilizers (Osmocote®) allow to produce larger seedlings, they are more expensive than fertigation.

中文翻译：

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甘蔗和百香果幼苗的缓释肥料或施肥？农艺性能和成本

本研究的目的是评估在管状甘蔗和百香果幼苗生产中缓释肥料和灌溉施肥的农艺性能和成本。两个实验同时进行，一个是从带有一个芽 (4 cm) 的茎中获得的甘蔗幼苗 (SP80-3280)，另一个是从种子中获得的百香果 (FB-300)。两个实验均在 200 厘米 3 的管中进行，管内装有堆肥的松树皮基质，有六种处理：（1）对照；(2) 标准施肥（g 100 L -1 底物），(NH 4 ) 2 SO 4 (300) + KCl (200) + 热磷酸镁 (200) + Osmocote® 15-9-12 Plus (600) + Osmocote ® 19-6-10 迷你颗粒 (600)；(3) Osmocote® 15-9-12 Plus（600 g 100 L -1 底物）；(4) Osmocote® 19-6-10 Mini-Prill（600 g 100 L -1 底物）；(5) 完全施肥（g 100 L -1 水），Ca(NO 3 ) 2 (80) + KNO 3 (50) + MgSO4 (35) + (NH 4 ) 3 PO4 (10) + ConMicros® Standard（ 2.5); (6) 常量元素灌溉施肥，等于 5。ConMicros® 除外。结果如下：（1）甘蔗（70天）和百香果（52天）幼苗在施肥管中比对照管大；(2) 标准施肥，Osmocote® Mini-Prill 或 Osmocote® Plus 生产出质量更大的甘蔗和百香果幼苗；(3) 施肥是最便宜的施肥方式；(4) 缓释肥料 Osmocote® 19-6-10 Mini-Prill 呈现出较大的幼苗，但其成本比灌溉施肥高（2-3 倍）。