Abstract
Four months after planting sugarcane variety RB867515, fertilized with 0.0, 4.5, 9.0, 13.5 and 18.0 Mg ha-1 of cow manure, there was positive linear effect of the fertilizer on plant height and stalk diameter, quadratic positive effect on width and length of the largest leaf, and no effect on number of plants m-1 linear and the number of leaves plant-1. At 10 months, there was quadratic positive effect of cow manure on plant height and no effect on number of plants, stalk diameter, width and length of the largest leaf and number of leaves plant-1. At 12 months, there was quadratic effect on the yield of green mass with the highest value on 18 Mg ha-1 of cow manure, without change on chemical composition. During the cutting time, the most pronounced effect of cow manure on sugarcane was in the yield of green mass and, therefore, up to 18 Mg ha-1 of cow manure can be used to increase sugarcane performance, without changing chemical composition and maintaining soil fertility. Key words: Agronomic characteristics, chemical analyses, organic fertilizer, residue, Saccharum spp.
Highlights
INTRODUCTIONThe sugarcane (Saccharum spp.) is one of the main crops in tropical countries and its cultivation has great
The most pronounced effect of cow manure on sugarcane was in the yield of green mass and, up to 18 Mg ha-1 of cow manure can be used to increase sugarcane performance, without changing chemical composition and maintaining soil fertility
The reduction of the levels of phosphorus in the soil became more apparent after the first cut of the cane, especially by using 0.0, 4.5 and 9.0 Mg ha-1 of cow manure (Table 1)
Summary
The sugarcane (Saccharum spp.) is one of the main crops in tropical countries and its cultivation has great. The use of organic compounds improves the physical, chemical and biological properties of the soil (Almeida Júnior et al, 2011), where the improvement of pH and nutrient levels in the soil are some benefits that provide increased sugarcane yield (Bulegon et al, 2012). According to Anjos et al (2007), it is feasible to replace chemical fertilizer by organic (farmyard manure), without loss of quality and yield of sugarcane. The purpose with this work is to evaluate the development and chemical composition of sugarcane in response to increasing levels of cow manure applied in the soil during the planting and the effect on soil fertility
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