New thinking on the reasonable utilization of non-competitive arable land in the hilly agricultural area

The non-competitive arable lands can be suitable to develop the agriculture production of the green vegetative mass.Many researchers indicated that the content of dry matter (DM) and crude protein (CP) in the vegetative mass were several times higher than their crop seed or straw(residues),so more animal products when green vegetative mass of crop was used for feeding animals could be obtained than their grain crops and by products.The reasonable utilization of non-competitive arable land is one of important strategic measurements to solve the food safety of 1.6 billion population in the 21st century in China.There are four agricultural production models of the vegetative mass with the feature of crop-livestock integration:grain-forage-animal production model in the fallow land,forestry-forage-animal production model in the wasted hillside field,fruit-forage-animal production model in the fruit garden and fish-forage-animal production model in the lakeside land and reservoir or pool-side land.