| 李红宇,林添,王志君,赵海成,郑桂萍,吕艳东,钱永德,范名宇.生物炭连续还田后效对盐碱土稻田养分、酶活性和腐殖质组分的影响[J].干旱地区农业研究,2022,40(4):135~142 |
| 生物炭连续还田后效对盐碱土稻田养分、酶活性和腐殖质组分的影响 |
| Effects of biochar continuous returning on soil nutrients, enzyme activities and humus components in soda saline\|alkali paddy field soil |
| |
| DOI：10.7606/j.issn.1000-7601.2022.04.15 |
| 中文关键词: 生物炭连续还田 盐碱土 土壤养分 酶活性 腐殖质组分 |
| 英文关键词:biochar continuous returning saline\|alkali soil soil nutrient enzymatic activity humus component |
| 基金项目:国家重点研发计划项目（2018YFD0300104） |
|
| 摘要点击次数: 537 |
| 全文下载次数: 374 |
| 中文摘要: |
| 为明确生物炭连续还田对苏打盐碱土稻田的改良效果，于2014—2019年通过盆栽试验研究了生物炭连续还田对苏打盐碱土稻田养分含量、电导率、pH值、酶活性和腐殖质组分的影响。结果表明：生物炭还田量为7.5～16.5 t·hm-2时，土壤全氮、全磷、有效磷和速效钾含量分别提高19.09%～30.00%、34.58%～45.37%、19.04%～39.16%、38.65%～63.12%（P＜0.05）；生物炭还田量12.0～16.5 t·hm-2，土壤碱解氮含量提高5.34%～6.87%(P＜0.05);土壤电导率随生物炭还田量增大呈先增后降的趋势，峰值在7.5 t·hm-2；土壤pH值与生物炭还田量显著正相关，并且生物炭12.0～16.5 t·hm-2 pH值显著高于不添加生物炭处理；生物炭年还田量7.5～12.0 t·hm-2时，有机质含量、腐殖质全碳量、胡敏素碳量分别较不添加生物炭处理提高48.74%～70.51%、47.40%～69.94%、68.94%～96.48%;HA/FA和PQ随生物炭还田量增大呈先增后降的趋势，峰值在12 t·hm-2；生物炭还田量7.5 kg·hm-2时，脲酶活性较不添加生物炭处理提高89.03%（P＜0.05），碱性磷酸酶降低41.27%（P＜0.05）；生物炭还田量12.0 kg·hm-2时，脲酶活性提高53.33%（P＜0.05），蔗糖酶活性提高41.84%(P＜0.05)。因此，生物炭连续还田能够有效改良苏打盐碱土稻田，7.5～12.0 t·hm-2为适宜生物炭还田量。 |
| 英文摘要: |
| To understand the improvement effects of biochar on soda saline\|alkali soil paddy field, pot experiments were set up during 2014 to 2019. The effects of continuous biochar returning on content of soil nutrient content, electric conductivity, pH, enzymatic activities and humus component were studied. The results showed that under biochar returning of 7.5~16.5 t·hm-2, the contents of total N, total P, available P and available K in the soil increased by 19.09%～30.00%,34.58%～45.37%,19.04%～39.16%,38.65%～63.12% （P＜0.05） respectively. Under biochar returning of 12.0～16.5 t·hm-2, Alkaline N in the soil increased by 5.34%～6.87% (P＜0.05). The soil electrical conductivity first increased and then decreased with the amount of biochar returning, and the peak value appeared at 7.5 t·hm-2. Soil pH was significantly positively correlated with biochar returning amount, and soil pH of biochar 12.0~16.5 t·hm-2 was significantly higher than that without biochar. Under biochar returning of 7.5~12.0 t·hm-2, compared with the treatment without biochar, organic matter content, total humus carbon and humin carbon content increased by 48.74% ~ 70.51%, 47.40% ~ 69.94% and 68.94% ~ 96.48% respectively. HA/FA and PQ increased first and then decreased with biochar returning amount, and the peak value was 12 t·hm-2. Under biochar returning of 7.5 t·hm-2, compared with the treatment without biochar, urease activity increased by 89.03% and alkaline phosphatase decreased by 41.27%. Under biochar returning of 12.0 t·hm-2, urease activity was increased by 53.33% (P＜0.05), and the invertase activity was increased by 41.84 % (P＜0.05). Therefore, continuous biochar returning effectively improved the paddy field of soda saline\|alkali soil. The 7.5～12.0 t·hm-2 amount is recommended as the suitable biochar returning from this study. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |