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INTERNAL AND EXTERNAL CRITICAL LIMITS IN ORGANOPONICS CONDITIONS WITH CACHAZA USE AS ORGANIC FERTILIZER.
ABSTRACT. It was carried out a study with the aim of achieving greater precision in the fertilization of substrates and in turn obtain sustained increases in yields, without that they will deteriorate further achieve well-nourished plants, for which the critical levels were determined external (P2O5 , K2O, MO , Ca and Mg ) and internal (N, P , K , Ca and Mg ) further evaluated the combined effects of dose of cachaza (0, 5, 10 and 15 kg/m 2) and the application at three points (begining , alternately and in every culture) in a sequence of vegetables , for three years, using a randomized block design with factorial arrangement and four replications. Sampling substrates each time I finish a cycle for external leaf samples at the end of each culture were performed during rotation, for critical internal limit , and . Analysis of the results critical internal limits (2.98 % N, 0.80 % P, 2.90 % K , 1.90 % Ca and 0.68 % Mg ) and external ( 7.65 mg.100g -1 P2O5 , 8.85 were obtained mg.100g -1 K2O , 6.20 mg.100g -1 mg/100g, de Ca 5.57 mg.100g-1 de Mg and 20.00 % of MO ), when the values obtained are below those that arise , apply 5 kg.m -2 cachaza every two cultures , to achieve returns above 40.0 kg.m -2 vegetables /cicle , if the values are above the manure is applied.
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