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“在上世纪80年代之前,限制我国耕地土壤生产能力的主要问题是土壤氮磷养分不足,随着多年来化肥投入量和作物产量的持续增长,耕地土壤氮磷养分供应状况较大改进,但是‘低、费、污’已经逐步成为我国耕地土壤质量新一轮的核心问题。如果不能确保18亿亩耕地红线,不能解决耕地质量问题,势必将威胁到国家粮食安全。”中国农业科学院农业资源与农业区划研究所副所长张维理如是说。我国各主要农区,由于长
Prior to the 1980s, the main problem of limiting the productivity of cultivated land in China was the lack of nutrients in soil. With the continuous increase in input of fertilizer and crop production over the years, the supply of nitrogen and phosphorus in cultivated soils was greatly improved, However, low, fee and pollution have gradually become the core issue of the new round of soil quality in cultivated land in our country.If we can not ensure the red line of 1.8 billion mu of cultivated land and can not solve the quality problem of cultivated land, it is bound to threaten the national food security. “” Chinese Academy of Agricultural Sciences Zhang Weili, deputy director of the Institute of Agricultural Resources and Regional Planning said. The main agricultural areas in our country, due to long