Pinching is done to affect canopy structure and is normally accomplished by removing the branch growing tip. Faba bean (Vicia faba L.) plays a role in biological fixation of aerial nitrogen, can be used to restore fertility in crop rotations, and is capable of satisfying its nitrogen requirements largely from the atmosphere. Its susceptibility to environmental conditions and biotic stress and instability of yield make it less attractive, and little is known about factors affecting growth and development. The experiment was conducted in a field from December 2010 to May 2011 to determine the effects of pinching on plant development and yield. Treatments were zero, one, two, and three pinchings. The first pinching was when plants had four true leaves. Second and third pinchings were when all lateral and sublateral branches had at least four leaves. At harvest, total seed and pod yield, number of pods per plant, pod weight, and number of lateral branches per plant were determined. Number of pods and shoots per plant, 100 seed weight, and pod and seed total yield were affected by treatment but not numbers of seed per pod and mean pod weight. Pinching two to three times produced more pods per plant and more pod and seed yields than not pinching. We propose pinching twice when plant main and lateral branches have four leaves to increase yield.
کلید واژگان :Vicia faba, Barkat, Broad bean, Canopy, Lateral branching, Pinching.
ارزش ریالی : 600000 ریال
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