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我国每年中小造纸厂作为污染物排放掉的木质素有３００万ｔ以上，不仅使大量资源成为废物，而且造成严重的环境污染。为了变废为宝、综合利用．在农业上用木质素作为拌种剂。通过砂培、土培和田间小区试验确定了木质素的使用量为种子重量的０．４％，ＰＨ为７．８左右。大田试验条件同小区试验，结果表明木质素拌种可提高小麦种子的发芽率；促进根系发展，增加有效分蘖数；能提高抗旱、抗病虫害能力；增加穗粒数，提高千粒重和公顷产量。如小麦、玉米在山东、河北和北京几处的试验均增产１０％以上。木质素拌种的生物效应与木质素从造纸废液中提取的方法、制浆原料产地、使用量、ｐＨ、作物品种和土壤肥力等有密切关系。从造纸废液中回收的木质素制成的拌种剂成本低、使用方便、无毒、可成为农业上一项可推广的实用技术。
Every year, China’s small and medium-sized paper mills discharge more than 3 million tons of lignin as pollutants, which not only makes a lot of resources become waste, but also causes serious environmental pollution. In order to turn waste into treasure, comprehensive utilization. In agriculture with lignin as a seed dressing. Through sand culture, soil culture and field plot tests, the amount of lignin used was 0.4% of the weight of the seeds and the pH was about 7.8. Field experiments were conducted in the same plot experiment. The results showed that lignin seed dressing could improve germination rate of wheat seeds, promote root development, increase effective tiller number, increase drought resistance and pest resistance, increase grains per spike, and increase grain yield per hectare and hectare. Such as wheat, corn in Shandong, Hebei and Beijing several tests have increased by 10% or more. The biological effect of lignin seed dressing is closely related to the method of lignin extraction from papermaking waste liquor, the origin of pulping raw materials, the usage, pH, crop varieties and soil fertility. The recovery of lignin from the papermaking waste liquid made of seed dressing low cost, easy to use, non-toxic, can be a useful agricultural technology.