ABSTRACT
Evaluation of four management practices in spring wheats, sown on irrigated soils of the central south zone of Chile

Mario Mellado Z.1
 

At the Quilamapu Experiment Station of the Instituto de Investigaciones Agropecuarias (INIA), twelve field trials were carried out to evaluate four management practices on spring wheat cultivars, considering as response parameters, biomass production, grain yield, and sedimentation value.

In a randomized block design, the following treatments were compared:

Tl (Best management) = K + N and P + herbicide + inseeticide and fungicide
T2 = Tl minus K
T3 = Tl minus N and P
T4 = Tl minus herbicide
T5 = Tl minus insecticide and fungicide

The conclusion were:

- The most important management practice in the production of the spring wheat varieties Onda-INIA and Nobo-INIA, was the N plus P application.
- In 66% of the trials, broad leaf weeds significantly decreased grain yield.
- Foliar diseases and aphids slightly decreased grain yield.
- Potassium did not have an effect on grain yield, even in some trials where maximum grain production reached 9,000 kg/ha.

Keywords:
1 Estación Experimental Quilamapu (INIA), Casilla 426, ChiIlán, Chile.