| 摘要: |
| 通过室内土壤培养试验，研究了绿肥二月兰（Orychophragmus violaceus）不同翻压量对土壤肥力的影响。结果表明，翻压二月兰可有效降低石灰性土壤pH值，45 000 kg·hm-2（处理Ⅰ）和90 000 kg·hm-2（处理Ⅱ）翻压量的土壤pH值在培养结束时（120 d）分别比对照降低了0.24和0.41个单位；翻压二月兰可显著提高土壤全氮、速效磷和速效钾含量，培养结束时处理Ⅰ、Ⅱ的土壤全氮、速效磷和速效钾含量分别比对照增加了0.06 g·kg-1、2.00 mg·kg-1、26.28 mg·kg-1和0.09 g·kg-1、3.32 mg·kg-1、63.00 mg·kg-1；土壤有效氮含量在翻压15天时达到峰值，此时处理Ⅰ、Ⅱ的有效氮含量分别比对照增加了12.95 mg·kg-1和21.70 mg·kg-1，但培养60天后各处理有效氮含量相近；翻压二月兰可在培养前期（22 d）较大幅度提高土壤有机碳含量，但22天后处理间差异缩小，培养结束时处理Ⅰ、Ⅱ的有机碳含量分别比对照增加了-0.06 g·kg-1和0.33 g·kg-1；翻压二月兰可降低土壤碳氮比，培养结束时处理Ⅰ、Ⅱ的碳氮比分别比对照下降了2.02和1.51个单位，降幅分别达到20.82%和15.58%。 |
| 关键词: 绿肥 二月兰 翻压量 土壤肥力 |
| DOI： |
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| 基金项目:公益性行业（农业）科研专项经费（200803029，201103005）；作物种质资源保护项目（NB2012-2130135-34）；江西省农业科学院创新基金（青年基金）项目（2012CQN002） |
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| Effects of different application rates of Orychophragmus violaceus on soil fertility |
| LIU Jia1, ZHANG Jie2, XU Chang-xu1, BA
I Jin-shun3, CAO Wei-dong3,4 |
| () |
| Abstract: |
| A laboratory incubation experiment was carried out to study the effects of different application rates of Orychophragmus violaceus on soil fertility. The results showed that the soil pH was reduced by application Orychophragmus violaceus. Compared to control soil, at the end
of the incubation the soil pH of 45 000 kg·hm-2（TⅠ）and 90 000 kg·hm-2 （TⅡ）application amounts was reduced by 0.24 and 0.41, respectively. The contents of soil total N, available P and available K increased 0.06 g·kg-1, 2.00 mg·kg-1, 26.28 mg·kg-1 for TⅠ, and 0.09 g·kg-1, 3.32 mg·kg-1, 63.00 mg·kg-1 for TⅡ. At 15 d after incubation, the soil available N contents of TⅠ and TⅡ reached the maximum, being 51.45 mg·kg-1 and 60.20 mg·kg-1 respectively. However, no significant effect was detected among the treatments after 60 d. Soil organic carbon content increased in the first 22 d, and after that no significant differences existed among treatments. Compared to the control soil, at the end of the incubation, soil organic carbon contents of TⅠa
nd TⅡ increased by -0.06 g·kg-1 and 0.33 g·kg-1, while the soil C/N ratio decreased by 2.02 and 1.51 respectively. |
| Key words: green manure Orychophragmus violaceus application amount soil fertility |
