Abstract
Adoption of legumes in cereal-based cropping systems and improvement of organic fertilizers are important to reduce chemical fertilizer use. We supplied compost and green manure (GM) of green pea plant residue (GP), without supplementation or supplemented with dried chicken manure (CM) and/or rapeseed oil residue (RR), for wheat and examined the effects of compost and GM (remaining fertilizer) on the rice of pea–wheat–rice system in two factorial pot experiments. Additions of pea residue resulted in an increase of 30% grains of rice compared to without addition, and compost increased 25% grains against GM. Supplementation increased 63–70% of rice grains as compared to the control. Nitrogen (N) and potassium (K) recovery efficiencies were correlated with yield, which suggested that composting and supplementation enabled effective nutrients accumulation in plant, resulting in better yield. Therefore, it is recommended that composting of GP with CM plus RR improves effectiveness of pea on rice of a pea–wheat–rice system.
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