As time goes on the total output of silkworm cocoon and planting acreage showed a decreasing trend and there was a competitive relationship between cocoon production and rice production.

• 从时间趋势上看，广东省的蚕茧生产总量和规模存在递减趋势，并且早、晚稻的种植对蚕茧生产存在竞争性关系。