Effects of gumping support and pinching on the yield of grass pea

Grass pea (Lathyrus sativus) is easy to become creeping due to thin and soft stem, which often causes the decomposition of lower leaf and stem. An experiment was conduct to determine the effect of humping support and pinching on the yield and of grass pea in this study. This study showed that the combination of the humping support and pinching significantly increased the yield and the pinching at the flowering stage increased the yield by 20.2%. The Spearman analysis result indicated that the branches per plant, one hundred seed weight, and pod number per plant were main factors affecting the yield. This also showed that the humping support and pinching increased the yield of grass pea by increasing the branch number of main stem and pod number per plant.