| 改性酒糟生物炭对紫色土养分及酶活性的影响 |
| 摘要点击 1225 全文点击 369 投稿时间：2022-09-21 修订日期：2022-10-26 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 酒糟生物炭 改性 土壤养分 酶活性 紫色土 |
| 英文关键词 lees biochar modification soil nutrients enzyme activity purple soil |
|
| 中文摘要 |
| 为探寻酒糟生物炭和不同改性酒糟生物炭对土壤性质的影响,采用盆栽试验研究不同土壤改良剂(CK:不施改良剂、JZ:酒糟生物炭、TiO2/JZ:酒糟生物炭负载纳米二氧化钛、Fe/TiO2/JZ:铁改性酒糟生物炭负载二氧化钛)和不同改良剂施用量(1%、3%、5%)在水旱轮作下不同处理土壤养分和酶活性的差异特征.结果表明:①改性酒糟生物炭显著提高了土壤pH和CEC(P<0.05).Fe-TiO2/JZ在5%添加量下水稻季土壤pH达7.95,较CK处理增加了2.3个单位; CEC达12.06cmol ·kg-1,增加了21.38%; 小白菜季土壤pH达5.99,较CK处理增加了1.5个单位; Fe-TiO2/JZ在3%添加量下CEC达到8.91cmol ·kg-1,增加了13.11%. ②同时显著提高了土壤全氮和有效磷含量(P<0.05).在5%添加量下JZ、TiO2/JZ和Fe-TiO2/JZ土壤全氮于水稻季较CK处理分别提高了20.56%、85.04%和59.61%,于小白菜季分别提高了12.39%、22.68%和23.70%.水稻季中Fe-TiO2/JZ在5%添加量下土壤有效磷增幅最大,达10.49mg ·kg-1,是CK处理的1.64倍; 小白菜季中TiO2/JZ在5%添加量下土壤有效磷最高,达90.15mg ·kg-1,相对于CK处理增幅达93.38%. ③改性酒糟生物炭提高了过氧化氢酶和脲酶活性,降低了AN含量和酸性磷酸酶活性.均在3%添加量下过氧化氢酶活性增幅最大,水稻季中分别提高了12.19%、48.17%和37.30%,小白菜季中分别提高5.95%、8.34%和17.42%; 水稻季中Fe-TiO2/JZ在5%添加量下土壤脲酶活性达到最大,较CK处理提高了40.90%,小白菜季中TiO2/JZ在5%添加量下土壤脲酶活性达到最大,较CK处理提高了58.53%; 水稻季酸性磷酸酶活性降低了5.39%~24.66%,小白菜季降低了54.46%~61.40%.改性酒糟生物炭可以有效提高土壤pH和土壤养分含量从而影响土壤酶活性,在酸性紫色土施用3%~5%的铁改性负载二氧化钛酒糟生物炭较为适宜. |
| 英文摘要 |
| In order to investigate the effects of distiller's lees biochar and different modified distiller's lees biochars on soil properties, pot experiments were conducted to study the effects of different soil amendments (CK:no amendment, JZ:distiller's lees biochar, TiO2/JZ:Nano-TiO2 supported by distiller's lees biochar, and Fe/TiO2/JZ:titanium dioxide supported by iron-modified distiller's lees biochar) and the application rates of different amendments (1%, 3%, and 5%) on the characteristics of soil nutrients and enzyme activities under irrigation-drought rotation. The results showed the following:①the modified distiller's lees biochar significantly increased soil pH and CEC (P<0.05). At the 5% Fe-TiO2/JZ addition level, the soil pH reached 7.95 during the rice season, an increase of 2.3 units compared with that in the CK treatment; the CEC reached 12.06 cmol·kg-1, increasing by 21.38%; the soil pH reached 5.99 during the cabbage season and increased by 1.5 units compared with that in the CK treatment; and CEC reached 8.91 cmol·kg-1 at 3% Fe-TiO2/JZ addition and increased by 13.11%. ②At the same time, the contents of soil total nitrogen and available phosphorus were significantly increased (P<0.05). Compared with that in the CK treatment, the soil total nitrogen of 5% JZ, 5% TiO2/JZ, and 5% Fe-TiO2/JZ increased by 20.56%, 85.04%, and 59.61% in the rice season and 12.39%, 22.68%, and 23.70% in the cabbage season, respectively. In the rice season, the increase in soil available P under 5% Fe-TiO2/JZ was the highest, reaching 10.49 mg·kg-1, which was 1.64 times that under CK treatment. In the cabbage season, the soil available phosphorus (P) reached 90.15 mg·kg-1 under 5% TiO2/JZ addition, which increased by 93.38% compared with that in the CK treatment. ③Modified distiller's lees biochar increased catalase and urease activities and decreased alkali-hydrolytic nitrogen content and acid phosphatase activity. At the 3% addition level, catalase activity increased by 12.19%, 48.17%, and 37.30% in the rice season and 5.95%, 8.34%, and 17.42% in the cabbage season, respectively. In the rice season, the soil urease activity reached the maximum under 5% Fe-TiO2/JZ addition, which was increased by 40.90% compared with that in the CK treatment. In the cabbage season, the soil urease activity reached the maximum under 5% TiO2/JZ addition, which was increased by 58.53% compared with that in the CK treatment. The activity of acid phosphatase decreased by 5.39%-24.66% in the rice season and by 54.46%-61.40% in the cabbage season. Distiller's lees biochar and modified distiller's lees biochar could effectively increase soil pH and soil nutrient content, thus affecting soil enzyme activities. The application of iron modified-titanium dioxide-loaded distiller's lees biochar of 3% to 5% in acidic purple soil is more suitable. |
|
|
|
