Study on conveyance technologies of highyield cultivation without environmental pollution of rice

The used quantities of seeds，fertilizers and pesticides were decreased，the production cost was reduced by 285 yuan and the incomes from paddy were increased by 1667 yuan per hectare in the demonstrative area of prod uction without environmental pollution of rice by a series of conveyance technologies of gymnastic cultivation of rice，using farm manure，organic manure for a special purpose of rice，applying pesticides without environmental pollution and agricultural methods，using chemical pesticides of high efficiency，low toxicity and lower residue of limited quantity against diseases，insect pests and weeds at necessary time．The residues of poisonous pes ticides，heavy metal and other indexes in rice are lower than the health targets of green food．Their natural enemies such as spiders and others should be increased in paddy fields．