贵州稻区稻蛙共生适宜的养蛙密度

Preliminary Study of Appropriate Density of Frog on Rice-frog System in Main Rice Planting Areas of Guizhou

为筛选出贵州稻区稻蛙共生适宜的养蛙密度,在贵州典型稻区遵义市播州区和天柱县栽培相同水稻品种下,投放黑斑蛙0只/667m^2、0.5万只/667m^2、1万只/667m^2、1.5万只/667m^2、2万只/667m^2进行稻蛙共生试验。结果表明:在稻蛙共生条件下,黑斑蛙不同投放量对水稻生长没有明显影响,但对黑斑蛙生长有影响,存活率播州区以投放密度0.5万只/667m^2的最高,达58.02%,随投放密度增加而降低;天柱县以1万只/667m^2最高,达58.30%,在1万~2万只/667m^2随密度增加而降低。从纯收益看,播州区的最适投放密度为0.5万只/667m^2,纯收益为2983元/667m^2;天柱县为1万只/667m^2,纯收益为4765元/667m^2。

In order to explore appropriate density of frog on rice-frog system in main rice planting areas of Guizhou,0,0.5×104 frogs/667m^2,1×104 frogs/667m^2,1.5×104 frogs/667m^2,2×104 frogs/667m^2 were applied under Rana nigromaculata Tadpoles and same rice variety in Bozhou District and Tianzhu County.The results showed that there was not obviously influence of frog density on rice growth under rice-frog system,but there was obviously influence of frog density on frog growth,the survival rate of 0.5×104 frogs/667m^2 in Bozhou District was greatest,survival rate decreased with the increasing of density.The survival rate of 1×104 frogs/667m^2 in Tianzhu County was greatest,survival rate decreased with the increasing of density range from 1×104-2×104 frogs/667m^2.According to the net benefit,the appropriate density of frog on rice-frog system in Bozhou District and Tianzhu County were 0.5×104 frogs/667m^2,1×104 frogs/667m^2,respectively,and the net benefit of which were 2983 Yuan/667m^2 and 4765 Yuan/667m^2,respectively.