Macronutrient and sodium content in maize plants under cassava wastewater fertilization

Abstract

A B S T R A C TThis study aimed to evaluate the content of macronutrients and sodium in corn (Zea mays) plants as a function of different doses of cassava wastewater and ages of the plants after emergence. The experiment was conducted in a greenhouse in pots with capacity for 25 dm 3 of soil, using a 5 × 3 factorial design with four replicates. The studied factors were doses of cassava wastewater: 0; 12.6; 25.2; 50.4; 75.6 m 3 ha -1 , and plant age: 20, 40 and 52 days after emergence (DAE). Potassium, calcium, magnesium, nitrogen, phosphorus, sodium and sulfur contents were evaluated in leaves and stalks. Nutritional deficiency of calcium was visible at 20 DAE. The increment in cassava wastewater doses increased N, P and K contents in plant shoots, but decreased Ca and Mg absorption. The contents of N, P and K in the leaves and N in stalks at 20 DAE were higher than at 40 and 52 DAE. The highest contents of P and K in the stalks occurred at 40 DAE.Teores de macronutrientes e sódio em plantas de milho biofertilizadas com manipueira R E S U M O Objetivou-se, com este trabalho, avaliar os teores de macronutrientes e sódio em plantas de milho (Zea mays) em função da aplicação de doses de manipueira e idade das plantas após a emergência. O experimento foi conduzido em casa de vegetação em vasos com capacidade de 25 dm 3 de solo usando o esquema fatorial 5 × 3 com quatro repetições. Os fatores de estudo foram doses de manipueira: 0; 12,6; 25,2; 50,4; 75,6 m 3 ha -1 e idade das plantas aos 20, 40 e 52 dias após a emergência (DAE). Foram avaliados, nas folhas e no colmo, os teores de nitrogênio, fósforo, potássio, cálcio, magnésio, enxofre e sódio. Aos 20 DAE as plantas apresentaram deficiência nutricional em cálcio. O incremento das doses de manipueira aplicadas no solo aumentou os teores de N, P e K na parte aérea das plantas e reduziu a absorção de Ca e Mg. Os teores de N, P e K nas folhas e de N nos colmos das plantas de milho, aos 20 DAE, foram maiores que aos 40 e 52 DAE. Os maiores teores de P e K foram registrados nos colmos aos 40 DAE.

Holistic Assessment of Biochar and Brown Coal Waste as Organic Amendments in Sustainable Environmental and Agricultural Applications

“…The ease of nutrient release from FYM was notably greater, thus leading to consistently higher K increases than from BIO and BCW, and the synergy with NPK to increase available K is also well reported (Káš et al 2016). The K requirements of most plants, unlike N, are low and can be adequately supplied through FYM amendment at 12-15 t ha -1 (Magalhães et al 2016). Therefore, the higher FYM rate (30 t ha -1 ) used in this study must be in some measure responsible for the high available residual K content in the FYM treatments.…”

Effect of Cow Dung as Organic Manure on the Productivity of Cajanus cajan (L.) Millsp (Pigeon pea)

“…Dalam penelitian ini bahan dasar pupuk organik yang digunakan adalah kotoran sapi, daun, dan batang jagung yang sudah kering. Batang dan daun jagung mengandung hara makro nitrogen, fosfor, dan kalium serta beberapa hara mikro seperti kalsium, magnesium, besi, mangan, dan zinc (Ferreira et al, 2014;Magalhães et al, 2016). Pemberian batang dan daun jagung diharapkan dapat menambah ketersediaan unsur hara dalam pupuk organik.…”