ABSTRACT. Go back

Gotardo Schenkel S.1, Pedro Baherle V.2, Tatiana Floody A.3 y Mauricio Gajardo M.4

The pot trial-tests with rye grass H-1 (Lolium perenne X Lolium multiflorum) performed with 39 soils of the province of Malleco, indicate that the dominant nutritive deficiencies correspond to phosphorus, potassium and sulphur. Nitrogen is not considered in these experiments.
The intensity of these mineral deficiencies are measured through lines of fertility. They follow a semilogaritmic equation of the form: log Y = log A + mX, where X is the yield of the incomplete fertilization treatment.
The average value of "A" for the 39 soils are: 54,1; 92,0; 100,8; 104,6; 103,2; 105,2 and for "m" the following values are calculated: -95,6; -1297; -112; -1511; -323 X 10-5. These values correspond to P, K, Ca, Mg, S and micronutrients (B, Cu, Mo, Zn and Mn) respectively.

Key words:

1Ing. Químico, Proyecto Fertilidad de Suelo, Estación Experimental Carillanca, Instituto de Investigaciones Agropecuarias (INIA), Casilla 58-D, Temuco, Chile.
2Ing. Agr., Proyecto Fertilidad de Suelo, Estación Experimental Carillanca, INlA.
3Laboratorista Químico. Proyecto Fertilidad de Suelo, Estación Experimental Carillanca, INIA.
4Ayudante de laboratorio e invernadero, Proyecto Fertilidad de Suelo, Estación Experimental Carillanca, INIA.

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