PLANTING FERTILIZATION AND NITROGEN DOSES IN TOPDRESSING IN SECOND-CROP CORN

IF 0.4 Q4 AGRONOMY

Revista de Agricultura Neotropical Pub Date : 2022-10-31 DOI:10.32404/rean.v9i4.6968

Luciana Sabini da Silva, Rogério Lamim Silva Junior, Cecília Leão Pereira Resende, Rafael Marangoni Montes, Katiane Santiago Silva Benett, C. G. S. Benett

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引用次数: 2

Abstract

The present study aimed to evaluate the influence of fertilization formulated at planting and doses of nitrogen in topdressing on the yield components of second-crop corn. The experiment was conducted between March and June 2018 on the farm of the State University of Goiás, University Unit of Ipameri-GO. The randomized block design, arranged in a 3 x 5 factorial scheme with four replications, was used. Three fertilizer formulations at planting (06-22-12; 08-20-15 and 06-22-12 + 2% organic carbon) and five doses of N (0, 50, 100, 150 and 200 kg ha-1) in topdressing were evaluated. Leaf nitrogen content, fresh and dry mass of leaves, plant height, stem diameter, first ear insertion height, length and diameter of ears, 1000-grain weight, the mass of plants per hectare, extraction of nitrogen, and grain yield were assessed. Given the results, NPK formulated fertilizers can be used indifferently to grow second-crop corn. Nitrogen doses in topdressing have satisfactory results up to the estimated rate of 135 kg ha-1 for the cultivation of second-crop corn.

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二茬玉米种植施肥与追肥施氮量

本研究旨在评估种植时配方施肥和追肥中的氮剂量对二茬玉米产量构成的影响。该实验于2018年3月至6月在戈亚斯州立大学伊帕梅里GO大学的农场进行。采用随机分组设计，采用4次重复的3×5析因方案。对种植时的三种肥料配方（06-22-12；08-20-15和06-22-12+2%有机碳）和追肥中的五种N剂量（0、50、100、150和200kg ha-1）进行了评估。对叶片含氮量、叶片鲜干质量、株高、茎径、第一穗插入高度、穗长和穗径、1000粒重、每公顷植株质量、氮的提取和粮食产量进行了评估。根据研究结果，NPK配方肥料可以用于种植第二茬玉米。追肥施氮量对二熟玉米的增产效果令人满意，达到135 kg ha-1。

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