Study on rice ultra-high yield and it’s economic and ecologicalbenefits in Jinngsu Province

The potential effects of varieties,fertilizers andenvironmental componentas and their combination on rice yieldhave been studied The energy balance,the balance of soil nutri-ents and organic matter, the economic benefits and productivitymdex of ultra-high yielding rice have also been analysed The re-sults suggested that improvement of soil water condition and thecombination of varieties fertilizers and environmental componentsas a package is a technical direection for achiving rice ultra-highyield and for increasing its economic and ecological benefits.