蚯蚓林地处理造纸污泥试验

为了更好地寻求公司造纸污泥的新出路和解决林地有机肥料的来源问题，通过在杨树林地内利用蚯蚓处理造纸污泥，研究了处理60天后3个混合污泥及林地土壤养分的变化情况，以及处理1年和2年后对林木生长的影响。结果表明：蚯蚓处理60天后，3种混合污泥有机质和总P比处理前分别减少11%~47%和60%~90%，而总N和总K分别增加50%~200%和43%~179%。不同土层土壤有机质均提高7%~42%；上中层速效N提高2%~22%，下层减少21%~83%；上层速效P提高31%~51%，中下层减少20%~49%；pH值均略有升高，但前后差异不大。处理1年后，E2（老好氧污泥72%+苇渣28%）的杨树单株材积生长量和胸径生长量均为最大，分别为0.0047 m³和4.7 cm，分别比对照提高了155%和47%。处理2年后，E2的杨树单株材积生长量和胸径生长量仍为最大，分别为0.0248 m³和9.1 cm，分别比对照提高了243%和47%。因此，处理E2对杨树的生长最为有利。3种处理中，E3（新好氧污泥72%+苇渣20%+脱墨污泥8%）的蚯蚓个体生长最好，E1（新好氧污泥72%+苇渣28%）的产茧率最高；蚯蚓处理污泥过程中，产茧主要集中在0~10 cm这一层。

The Experiment on Using Earthworm to Treat the Paper Mill Sludge on Woodland

The paper aims to look for the new way of the paper mill sludge utilization and solve the sources of the organic fertilizer for woodland. The variances of 3 mixed sludge and soil nutrient in 60 days and the effect of earthworm on poplar growth in 1 year and 2 years were studied by using earthworm to treat paper mill sludge in poplar lands. The results showed that the organic matter and total P in 3 kinds of mixed sludge decreased by 11%-47% and 60%-90% respectively in comparison with that of 60 days ago, and the total N and total K increased by 50%-200% and 43%-179%, respectively. The soil organic matter in different layers increased by 7%-42%; the available N in upper and middle soil layer increased by 2%-22%, while decreased by 21%-83% in lower layer; the available P increased by 31%-51% in upper layer, while decreased by 20%-49% in middle and lower layer; the pH values were increased slightly with no significance difference. After 1 year treatment, the single tree volume growth and DBH growth of treatment E2 (the old aerobic sludge 72% reed residue 28%) after 1 year were the highest, which were 0.0047 m³ and 4.7 cm respectively, increasing by 155% and 47% respectively compared with control. The single tree volume growth and DBH growth treated by E2 in 2 years were the highest, which were 0.0248 m³ and 9.1 cm respectively, increasing by 243% and 47% compared with control. Therefore, treatment E2 (the new aerobic sludge 72% reed residue 20% deinking sludge 8%) showed the best effect on the growth of poplar. E3 (the new aerobic sludge 72% reed residue 28%) had the best result on the individual earthworm growth, and E1 was the most rational to the cocoon production. The cocoon production mainly conducted in 0-10 cm layer during the earthworm treating sludge.