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為黑土加“油”——“耕地中的大熊貓”，我們這樣保護

2020-08-05 09:00來(lái)源：新華網(wǎng)

在吉林省梨樹(shù)縣四棵樹(shù)鄉三棵樹(shù)村“科技小院”試驗田，中國農業(yè)大學(xué)學(xué)生沙野在黑土地中采集樣本（2019年7月24日攝）。新華社記者張楠攝

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