Níveis de palhiço, manejo e qualidade física de solo cultivado com cana

Abstract

The sugarcane (Saccharum spp.) is a grass semiperene, with big production in Brazil,and be ause of large tracts of cultivated land, requires highly technified agriculturalmechanization. However ent ils various problems such as compaction. So the use of minimum tillage systems has been each time. So the use of minimum tillage systems has been increasingly used as the no tillage, with the deposition of chaff in the soilable to promote various benefits to soil attributes. In this way the maintenance of certain post levels coupled with the use of scarification can promote benefits for physical quality and production of sugar cane. In the context, the objective was to evaluate the effect of straw levels remaining in no-tillage soil and different sugarcane management on soil physical attributes and crop productivity. The experimental design was randomized blocks with four repetitions, in sub subdivididas plots scheme. The plots were composed by no-tillage and conventional tillage, with 3 levels of remaining palhiço (0%, 50% and 100%), and the use of scarification(with and without scarification). The samples were collected with preserved structure in the depths of 0,05 m and 0,15 m, and subsequently analyzed in the laboratory asthe quantification of the least limiting water range (LLWR), load bearing capacity (LBC) and other attributes of the soil, in addition to the productivity of sugarcane. The maintenance of the leaves and stem tips using the rip fence results in increasing of IT both in the no-tillage system as in the conventional system at both depths. In the two systems and planting depths evaluated treatments with 50 and 100% of chaff indicated lowest LBC, concluding that the palhiço management systems promoted increment as the physical quality of this soil. No-tillage benefited the production of stalks (TCH) and sugars (TAH) per hectare, while the absence of stalks promoted an increase in the total recoverable sugar (ATR) concentration.