春天一(yi)来，商都县(xian)农(nong)牧和科技(ji)局(ju)局(ju)长庞(pang)学峰便忙于(yu)入农(nong)户、进田头，落实低耗水(shui)作物种植计划。“从前(qian)都是(shi)把旱(han)地改良为水(shui)地，提(ti)高农(nong)业(ye)单产。现在‘水改旱’，只(zhi)为(wei)保(bao)护察汗(han)淖尔湿地。”