春天一来，商都县农牧(mu)和科技局局长庞学峰便忙于(yu)入农(nong)户、进田(tian)头，落实低耗水作(zuo)物(wu)种(zhong)植计划。“从前(qian)都(dou)是把(ba)旱地(di)改良(liang)为(wei)水地(di)，提高农(nong)业单产(chan)。现在‘水(shui)改旱’，只为保(bao)护察汗(han)淖(nao)尔湿地。”