Sample records for iron sulfates
from WorldWideScience.org

Sample records 1 - 2 shown.



1

Adubação da cana-de-açúcar: IX - Experimentos preliminares com micronutrientes/ Fertilizer experimeits with sugar cane: IX - Preliminary results with minor elements

Alvarez, R.; Wutke, A. C. P.
1963-01-01

Resumo em português Neste trabalho são apresentados os resultados obtidos era três experimentos para verificar possíveis deficiências de micronutrientes e de magnésio em solos tipos terra-roxa-misturada e massapê-salmourão, cultivados há mais de quinze anos com cana. Foram feitas aplicações de sulfato ferroso, tetraborato de sódio, sulfato de magnésio, sulfato de manganês, sulfato de cobre, sulfato de zinco e molibdato de amônio, nos sulcos de plantio, na presença de NPK. Nos (mais) solos massapê-salmourão, os micronutrientes boro, molibdênio, ferro e cobre determinaram aumentos na produção de cana. Resumo em inglês In this paper are presented the results obtained with three experiments on the application of minor elements and magnesium to sugar cane, on soils known as "terra-roxa-misturada" and "massapê-salmourão" which for many years had been cultivated with this graminea. The treatments with four replications, in randomized blocks, were as follows: 1) NPK (control), 2) NPK + Fe, 3) NPK + B, 4) NPK + Cu, 5) NPK + Mn, 6) NPK + Zn, 7) NPK + Mo, 8) NPK + Mg and 9) NPK + (Fe + B + Cu (mais) + Zn + Mg + Mn + Mo). The nitrogen, phosphorus and potassium were applied as ammonium sulfate, superfosfate and potassium chloride at the rates of 150 kg/N, 100 kg/P2O5 and 150 kgK2O per hectare. The elements were applied in the furrows in addition to the basic fertilization: iron, magnesium, manganese, copper and zinc, as sulfates; boron, as borax and molybdenum as ammonium molybdate. The results indicated that boron, iron, copper and molybdenum gave a yield increase in the soil massapê salmourão, whereas ou "terra-roxa-mistura da", effects were not significant.

Scientific Electronic Library Online (Portuguese)

2

Adubação da cana-de-açúcar: XV - experimentos com micronutrientes nas regiões canavieiras do estado de São Paulo/ Fertilizer experiments with sugar cane: XV - results of micronutrients application

Alvarez, Raphael; Wutke, Antônio Carlos Pimentel; Arruda, Hermano Vaz de; Godoy Júnior, Gentil
1979-01-01

Resumo em português São apresentados os resultados de 23 experimentos em regiões canavieiras paulistas, para avaliar possíveis respostas da cana-de-açúcar a micronutrientes. Fizeram-se aplicações isoladas de sulfato ferroso, tetraborato de sódio, sulfato de cobre, sulfato de zinco, sulfato de manganês e molibdato de amônio, nos sulcos de plantio e na presença de adubação NPK Em apenas um dos experimentos verificou-se efeito significativamente favorável à aplicação de micronu (mais) trientes, no caso, cobre e molibdênio. Com base nos resultados obtidos, corroborados por análises foliares em trabalho paralelo e conduzido à mesma época, concluiu-se que, nas condições do ensaio, deficiências de micronutrientes não constituem problema para a lavoura canavieira no Estado de São Paulo. Resumo em inglês The results obtained with twenty three experiments on the application of micronutrients to sugar cane are presented in this paper. The experiments were installed to evaluate the possible occurrence of micronutrient deficiencies in soils of São Paulo state that had been more intensively cultivated with this crop. Therefore, in the localization of the field plots care was taken securing a large variation of conditions, especially those of the soil that are related to avail (mais) ability of micronutrients. The experiments were planted in randomized block designs with four replications. The treatments were as follows: 1. 000 (general control); 2. NPK (control); 3. NPK + Fe; 4. NPK + B; 5. NPK + Cu; 6. NPK + Zn; 7. NPK + Mn; 8. NPK + Mo. The nitrogen, phosphorus and potassium were applied as ammonium sulfate, superphosphate and potassium chloride, at the rates of 80kg/N, l00kg/P2O5 and 120kg/K2O per hectare. The micronutrients were applied in the furrows in addition to the basic fertilization: iron, manganese, copper and zinc, as sulfates; boron, as borax, and molybdenum as ammonium molybdate. In accordance with the purpose of the study the soils of the experiments showed great variation in the characteristics that are involved with the micronutrients availability, as the pH and the original fertility level. In spite of this, in only one of the experiments the micronutrients, cooper and molybdenum in the case, gave yield increases; even so, the responses were not clearly related to the soil characteristics. The results indicate that problems concerning micronutrient deficiencies are not to be expected in the normal conditions of the sugar cane culture in São Paulo state, Thus, the possible occurrences of such anomalies, until now, must be related to fortuitous events.

Scientific Electronic Library Online (Portuguese)