资源节约型农业呼唤控释肥　利用率可由35%提高到65%～80%，能节肥1/4

“我家一年要追肥三四次，家里劳动力不够，出去打工的人还要回来帮忙，可费劲了。头年上土肥，扒粪田，然后再施化肥，人力投入很大。”在自家的桃园里，山东省临沭县南古镇后醋庄村民武儒洪向中国科学院院士印象初提

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