Corn cultivar intercropping with arboreal legumes for weed control

Abstract

Gliricidia (Gliricidia sepium) seedlings are usually beneficial to corn crops when planted between corn rows. The objective of this work was to assess the effects of corn intercropped with gliricidia and "sabiá" (Mimosa caesalpiniifolia), a species native to the Brazilian northeastern region, on weed control and corn green ear and grain yields. The experiment was carried out at Estação Experimental da Universidade Federal Rural do Semi-Árido - UFERSA (Mossoró, State of Rio Grande do Norte, Brazil). The experimental design consisted of randomized complete blocks (multifactorial design) with five replications, arranged in split-plots. The plots consisted of corn cultivars AG1051 and BM 2022; subplot treatments (six) were no-hoeing, twice-hoeing (at 20 and 40 days after sowing) and intercropping with gliricidia and "sabiá", either directly sown or transplanted, simultaneously with corn sowing. The intercropped leguminous plants were spaced 0.40 m from each other, and directly seeded or transplanted (30-day-old seedlings) in between two 1 m-spaced corn rows. Twenty three weed species were identified during the experiment. Gliricidia seedlings were superior to "sabiá" seedlings with regard to plant height and survival rate. The highest corn green ear and grain yields were found for twice-hoed subplots, while the lowest yield was found for no-hoed or intercropped subplots. However, grain yield values in intercropped treatments did not differ from grain yield values in hoed plots. In addition, marketable husked green ear mean weights did not differ between twice-hoed subplots and subplots directly seeded with gliricidia and "sabiá". Such results indicated that corn benefited from the intercropping system, but intercropping with gliricidia and "sabiá" transplanted resulted in lower benefits than with the direct sowing of those species.

Comparative Evaluation of Sonicated Shrimp Waste Hydrolysates as Potential Fertilizers for Legumes

“…Five replications of each treatment were arranged in a fully randomized design. The germinated seeds were then treated with 4 g of the fertilizers in three amendments and these treatments were started on 1-week-old legume seedlings that emerged from direct seeding [12 d after direct seeding (DADS)] (Silva et al, 2013). Four and 8 weeks after direct seeding, a second and third treatment was applied, whereas in the control treatment, no fertilizer was added (water only) (Romany a et al, 2012).…”

Identifikasi morfologi dan agronomi jagung hibrida Unpad pada tumpangsari dengan padi hitam di dataran tinggi Arjasari Jawa Barat

“…Interaksi yang terjadi dapat bersifat positif atau saling mendukung maupun negatif. Pada tumpangsari jagung/legume, menunjukkan bahwa jagung memiliki hasil yang lebih tinggi pada bobot biji per plot dan bobot tongkol dengan kelobot hijau (Silva, et al, 2012). Pada penelitian lain dimana jagung manis unpad di tumpangsarikan dengan cabai memberikan produktivitas hasil tertinggi, ratio kompetisi menengah dan indek toleransi rendah saat cabai ditumpangsarikan dengan jagung pada pola 2:1 (Ruswandi et al, 2016).…”