| .生物炭对塿土土壤含水量、有机碳及速效养分含量的影响[J].农业环境科学学报,2013,32(5):. |
| 生物炭对塿土土壤含水量、有机碳及速效养分含量的影响 |
| Effects of Biochar on Soil Moisture, Organic Carbon and Available Nutrient Contents in Manural Loessial Soils |
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| DOI：10.11654/jaes.2013.05.019 |
| 中文关键词: 生物炭 塿土 土壤含水量 有机碳 速效养分 |
| 英文关键词: biochar manural loessial soil soil moisture organic carbon available nutrients |
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| 摘要点击次数: 2486 |
| 全文下载次数: 1967 |
| 中文摘要: |
| 生物炭作为土壤改良剂对酸性土壤改良研究有较多的报道，但是关于北方石灰性土壤研究报道很少，通过田间小区试验研究生物炭不同施用量对陕西关中塿土土壤含水量、有机碳和速效养分含量的影响。试验处理为：不施生物炭（CK）、生物炭施用量1000 kg·hm-2（T1）、5000 kg·hm-2（T2）、10 000 kg·hm-2（T3）、20 000 kg·hm-2（T4），3次重复，随机区组排列，小麦生育期定期采样（分蘖期、返青期、拔节期、抽穗期、灌浆期）。结果表明：小麦生育期内，不同处理土壤含水量随生物炭施用量提高呈先降低后升高趋势，T4最高，T2最低；土壤有机碳含量表现为T4>T3>T2>T1>CK；土壤碱解氮和有效磷含量均随着生物炭施用量的增大呈先增加后降低趋势，处理T1最高，T4和CK最低；土壤速效钾含量T4>T3>T2>T1>CK。综合来看，在上述研究条件下，生物炭高施用量比低施用量有利于提高土壤含水量、土壤有机碳和速效钾含量，但在生物炭低施用量下土壤碱解氮和有效磷含量显著增高。 |
| 英文摘要: |
| It has been considerably reported about the applications of biochar as soil amendment to acidic soils, however, few literature has been reported about the applications of biochar to calcareous soils of northern China. Therefore, a field trail was conducted to study the effects of biochar on soil moisture, soil organic carbon and available nutrient contents in manural loessial soils of Guanzhong area, Shaanxi Province, PR China. The trail design was the randomly arranged blocks, with 5 treatments and 3 replications. The experimental treatments included 5 levels of biochar：no biochar（CK）, 1000 kg·hm-2（T1）, 5000 kg·hm-2（T2）, 10 000 kg·hm-2（T3） and 20 000 kg·hm-2（T4）, and soil samples were sampled at regular intervals during wheat crop growing period（tillering stage, reviving stage, jointing stage, heading stage and grain filling stage）. The results indicated that the soil moisture contents of all the treatments showed an increasing trend after a decrease, with the rise of biochar application rates, and maximum soil moisture was recorded in T4, while minimum moisture was recorded in T2. The order of soil organic carbon contents of different treatments was recorded as T4>T3>T2>T1>CK. The contents of alkaline hydrolysis nitrogen and available phosphorus were highest in T1 while the minimum contents were recorded in T4 and CK, generally, these two parameters showed an initially increase but decreasing subsequently trend, with the increasing application rates of biochar. The soil readily available potassium contents in the different treatments followed a order as T4>T3>T2>T1>CK. It can be concluded that as compared with the low application rates of biochar, higher biochar application rates were conducive in enhancing the soil moisture, soil organic carbon and readily available potassium contents, however, low application rates of biochar markedly increased the alkaline hydrolysis nitrogen and available phosphorus contents of soil as compared with the higher rates of biochar. |
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