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　　春天一来，商都县农(nóng )牧和(hé )科(kē )技(jì )局(jú )局长庞学(xué )峰(fēng )便忙于(yú )入农户、进田头，落(luò )实(shí )低耗水作物(wù )种(zhǒng )植(zhí )计划。“从前(qián )都是把(bǎ )旱(hàn )地改良为水地，提高农(nóng )业单产(chǎn )。现(xiàn )在‘水改旱(hàn )’，只为保护(hù )察汗淖尔湿地。”