Breeding effects of different batches goose in the coupled crop-livestock system

In order to determine the growth dynamics and contribution ratio of different feeding fields for goose, two batches of goose raised on coupled crop-livestock production system in the agro-livestock ecotone on the Songnen Plain were compared. The results show significant changes in the monthly dynamics of goose grazing space with a staged evidence of spatial utilization of the feeding space. The tendency is that birds graze in farmland in June ~ August and move to grassland in September ~ October. The rate of average weight gain in the first batch is faster than that in the second. Feeding field contribution ratio of the two batches is different — highest for croplands in the first batch of goose while highest for grasslands in the second batch of goose. Contribution ratio of the different feeding fields and average weight gain rate in goose reflect the efficiency and benefit of the coupled agro-system. This is not only in close relation with demand and supply of goose feed, but is also closely related with environmental factors surrounding one month-old goose population. Further research on both the internal performing rhythm and external influencing factors of coupled crop-livestock system in the ecotone of the Songnen Plain should be conducted.