reproduction rate

When mechanical contamination is completely eradicated in the process of wheat seed reproduction by the technology of no-removing the off-types, the purity of foundation seeds and certified seeds are mainly determined by two factors of the breeder seed purity and the natural cross-pollination rate.

采取免去杂技术繁殖小麦种子时，决定所繁殖原种和良种纯度的2个主要因素是繁殖种纯度和品种天然异交率。

The reproduction rate of snails decreased with the increase of altitude. The reproduction rate in 2635 meters was low. Snails cannot reproduce in 3000 meters.

随着海拔的升高而降低，海拔2635米处繁殖率低，3000米处钉螺已不能繁殖，经过统计存在差异。

He increased the reproduction rate of rabbits by inducing oestrus.

他使用催情的方法来提高兔子的繁殖率.

The reproduction rate is the rate at which a population produces new members by birth.

生殖率即一个群体通过生育来繁殖新成员的比率。

The investigating results show that fabricius has characteristics of easy raising, short period of reproduction, high reproduction rate.

调查结果表明蠋敌具有易饲养，繁殖周期短，繁殖率高，食量大，食性杂等优点。

Sprouting is also the type of regeneration but is of weak capacity, with the net reproduction rate R o < 1.0, intrinsic increase rate r m < 0, which indicates the population will decrease.

也可通过萌蘖繁殖进行天然更新，但更新能力较弱，种群净生殖率Ro＜1.0，内禀增长能力rm＜0，种群数量将递减。

Small Tail Sheep is an all-year-around reproduction sheep, which gives two births a year or three births in two years. The average lambing number per parturition is from 2 to 5 lambs and the lambing rate can be as high as 260%.

小尾寒羊是世界上繁殖力很高、一胎产羔数在个体间变异较大的绵羊品种，四季发情，一年两胎或两年三胎，每胎2-5羔，胎均产羔率为260%。

The reproduction rate of teh aphid is influenced by nutrition.

蚜虫的繁殖率受到营养的影响.

Its advantages are high mutagenic ratio and optimized rate, and high reproduction speed.

该方法具有诱变率高,优选率高等优点, 并且能够迅速繁育苗木,缩短育种年限.

Campbell hamsters that have a fast reproduction rate were fed for two years with ordinary soya beans, which are widely used in agriculture and those contain different percentages of GM organisms.

试验中，具有快速繁殖能力的坎贝尔仓鼠被连续喂养两年在农业生产中普及了的含有转基因有机物的大豆。