稻—麦轮作期紫色土农田生态系统钾素平衡状况怎样？
Whether was potassium balance kept in purple soil cornfield ecosystem under a rotation of rice and wheat?
坡地钾素平衡及管理研究于2000年开始在贵州南部开展。
A study on potassium balance and management on sloping land was conducted in south Guizhou province of southwest China in 2000.
在国家紫色土肥力与肥料效益监测基地上，研究了稻麦轮作制度下紫色土稻田生态系统中钾素的平衡状况。
Potassium(K) balance in purple soil rice field ecosystem under rice-wheat rotation were studied on the National Purple Soil Fertility and Fertilizer Efficiency Monitored Base.
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