Indian Journal of Ecology

The study was undertaken to investigate the effects of homegarden mixed tree canopy on the seed germination and initial growth parameters such as root length, shoot length, shoot: root ratio and seedling vigour index of five agricultural crops namely, maize (Zea mays L.), chilli (Capsicum annuum L.), bean (Phaseolus vulgaris L.), lady's finger (Abelmoschus esculentus L.) Moenchand mustard (Brassica nigra L.). Seed germination in maize and chilli was significantly higher in full light condition whereas partial shade under medium canopy cover enhanced germination of beans and mustard. The best germination (96.7%) for lady's finger was under the lowest light condition. Mean germination time of the test crops did not vary with light conditions except for lady's finger. Low light condition stimulated shoot length in the test crops. Contrarily, exposure to full sunlight (canopy <10–40%; max.-10000 lx) significantly enhanced root growth in chilli, beans and lady's finger. In maize and mustard medium light (canopy 40–70%; Partial shade with max.-7000 lx) seemed to stimulate root elongation. It can be concluded that different crops have different light requirement for their germination and growth. Productivity of these crops in homegarden agroforestry can be enhanced by manipulating overhead canopy adopting efficient canopy management techniques.