Through the experiment in Ma Lan farm, it is indicate that: If you want to reach the natural productive potential under PS-1 condition, the mount of appliedfertilizer is still far insufficient.

• 通过具体案例辛集市马兰农场试验表明：要想达到PS-1条件下的自然生产潜力各处理的施肥量还远远不足；