Resumen de Long-term response planting method on wheat under conservation agriculture
María Isabel Escobosa García, Fidel Núñez Ramírez, Roberto Soto Ortiz, Carlos Orozco Riezgo, Luis F. Escoboza García, Ruelas Islas Jesús del Rosario, Francisco Higinio Ruiz Espinoza
Objective: To compare different bed planting systems: narrow beds, wide beds, and f lat soil, on the growth and yield of wheat under conservation system.
Design/methodology/approach: Treatments were established on a complete block design with three replicates. Also, wheat crop was grown during five seasons. Treatments were as follow: wide beds (100 cm), narrow beds (80 cm) f lat soil. Response variables were dry weight of 50 stems, weight of 1000 grains, number of spikes (m2), harvest index and yield. Also, the relationship between relative yield and cold units and degree-days were measured.
Results: The f lat beds treatment reached the highest stem weight, while the narrow beds had the highest number of spikes m2. Yield was the same between f lat beds and narrow beds. No differences were found in the harvest index between the evaluated treatments. When the variables were compared in the years evaluated, the dry weight of 50 stems increased and the harvest index was reduced, negatively affecting yield. A negative association was identified between the reduction of chilling hours and crop yield.
Study limitations/implications: The use of wide planting beds reduced the yield of the wheat crop, and its use is not recommended.
Findings/conclusions: The performance was the same between the treatment of f lat beds and narrow beds. The reduction in yield was mainly associated with the reduction in cold hours that occurred in each year of production.
