Results show that the proper application of black liquor of papermaking can improve the soil properties and increase the contents of organic materials, N and K in soil.
结果表明，造纸黑液适量施用能改善土壤物理性状，增加土壤有机质含量和氮、钾含量；
Black liquor is the waste liquor from alkali papermaking, but it is an excellent mixture of latent base, organic base and buffer base.
黑液是碱法造纸产生的废液，但它却是一种出色的潜在碱、有机碱和缓冲碱的混合物。
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