Effects of the integrated nutrient management on soil properties in table grape 'Crimson Seedless' during establishment

摘要

Integrated nutrient management (INM) can be defined as the combined use of available technologies and tools to design and apply the "best" possible plant nutrition programs, such as, use of diagnostic and follow-up tools, proper estimation of nutrientrates, use of high efficiency fertilizers, application of organic matter and inoculants, and precision agriculture (site-specific management). Under INM, the plant nutrition is as a result of adequate equilibrium among chemical nutrients, organic matter, microbial activity looking to improve soil quality and rhizospheric activity. To evaluate the effect of the addition of different types of organic matter and soil inoculant, as a complement of conventional fertilization, on soil quality and agronomic variables in table grape at establishment, a controlled experiment using large pots (100 L) was performed, using a complete randomized block design. Organic materials used were grape pomace compost and humic extract from the same material. The inoculant corresponded to a microbial consortium of plant-growth-promoting rhizobacteria (PGPR). Chemical fertilization included a complete NPK formula. The variety of table grape used was 'Crimson Seedless'. The soil used corresponded to an alluvial soil of mediumfertility, representative of the central area of Chile. Significant effects of applied treatments were observed with regards to some selected soil properties after one season of evaluation. On the whole, treatments including chemical fertilization and Cshowed larger plant growth, both in terms of shoot and root emission.