黑龙江省从80年代应用水稻旱育稀植灌溉、栽培技术以来，单产提高幅度较大，某些田块亩产超千斤，但是生产成本过高，增产不增收现象非常明显，出现了生产成本一次性投入过大，农户负担太重等情况。为降低水稻生产成本，增加产量，本着改善水稻生育群体结构，靠分桑增产的原则? Heilongjiang Province since the 1980s, the application of dry cultivation and cultivation of rice, planting and cultivation techniques, the yield increased significantly, some fields over 1000 pounds per mu, but the production cost is too high, the yield increase does not increase the phenomenon is very obvious, there is a production cost Sexual investment is too large, farmer burden is too heavy and so on. In order to reduce the cost of rice production and increase production, in line with the principle of improving the structure of rice breeding groups and increasing yield by planting mulberry,