Biotransformation of earthworm activity on potassium-bearing mineral powder
Biotransformation of earthworm activity on potassium-bearing mineral powder
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DOI：
10.1007/s12583-013-0313-6
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发表时间：
2013-03
影响因子：
3.3
通讯作者：
Xiaoling Zhu;B. Lian;Xue-peng Yang;Congqiang Liu;Lijun Zhu
中科院分区：
文献类型：
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作者：
Xiaoling Zhu;B. Lian;Xue-peng Yang;Congqiang Liu;Lijun Zhu
研究了蚯蚓在不同含钾矿粉添加量下对钾的生物转化。以10%~ 60%质量分数的PBMP与腐牛粪的混合物作为蚯蚓饲料，研究了蚯蚓对PBMP的释钾能力。含有20%和30% PBMP的混合物使蚯蚓生长繁殖良好，钾转化率较高。因此，矿粉的最佳掺量为20%和30%。比较了牛粪与PBMP的混合物和牛粪与相应比例石英粉的混合物，分析了不同组合下蚯蚓对PBMP的转化率。用牛粪与PBMP（8：2和7：3）混合液饲养蚯蚓30 d后，蚯蚓体内速效钾和有效钾含量分别为10824.3 ±35.9和11688.4 ± 16.1mg·kg-1，10079.6 ±62.2和10247.5 ± 172.7mg·kg-1。用牛粪和石英粉（8：2和7：3）混合物饲养蚯蚓30 d后，蚯蚓体内速效钾和有效钾含量分别为10623.3 ± 41.1和11385.5 ± 13.5mg·kg-1，9834.2 ±51.8和9907.6 ± 11.4mg·kg-1。因此，牛粪与PBMP混配的土壤速效钾和有效钾含量显著高于牛粪与石英粉混配的土壤速效钾和有效钾含量（P<0.05）。速效钾和有效钾的增量分别为201.0和302.9 mg·kg-1，245.4和339.9 mg·kg-1。因此，蚯蚓可以通过摄食、消化、吸收和排泄来激活钾并将其转化为有效钾。这为利用蚯蚓释放低品位含钾岩石中的钾，获取植物所需的速效钾和有效钾提供了新思路。
This study analyzes the biotransformation of earthworms on K in potassium-bearing mineral powder (PBMP) under different PBMP recruitments. A mixture of PBMP (10% to 60% mass fraction) and decaying cow dung was used as feed for breeding the earthworms to study the potassium-releasing ability of earthworms on PBMP in soil. The mixture containing 20% and 30% PBMP resulted in good growth and propagation of the earthworms as well as higher conversion rates of potassium. Therefore, the optimum recruitments of mineral powder are 20% and 30%. The mixture of cow dung and PBMP was compared with the mixture of cow dung and corresponding proportions of quartz powder to analyze the conversion rate of earthworms on PBMP in different combinations. After the earthworms were raised with the mixture of cow dung and PBMP (8: 2 and 7: 3) for 30 d, the contents of rapidly available K and effective K were 10 824.3±35.9 and 11 688.4±16.1 mg·kg−1as well as 10 079.6±62.2 and 10 247.5±172.7 mg·kg−1, respectively. After the earthworms were raised with the mixture of cow dung and quartz powder (8: 2 and 7: 3) for 30 d, the contents of rapidly available K and effective K were 10 623.3± 41.1 and 11 385.5±13.5 mg·kg−1as well as 9 834.2±51.8 and 9 907.6±11.4 mg·kg−1, respectively. Thus, the contents of rapidly available K and effective K in the mixture of cow dung and PBMP were significantly higher compared with those in the mixture of cow dung and quartz powder (P<0.05). The increment contents of rapidly available K and effective K were 201.0 and 302.9 mg·kg−1as well as 245.4 and 339.9 mg·kg−1, respectively. Therefore, earthworms can activate and trans-form K into effective K through feeding, digestion, absorption, and excretion. The results provided a new idea of using earthworms to release potassium in low-grade potassium-bearing rocks and obtain the rapidly available K and effective K needed by plants.