| 摘要: |
| 采用长期定位的方法,研究了翻压绿肥(田菁)后对京郊沙质潮土腐殖质结合形态及土壤物理性质的影响。结果表明:①连续翻压绿肥,可增加土壤有机物质的数量,促进土壤有机质的累积和腐殖质各组分的变化。②土壤中三种不同形态腐殖质含量顺序为紧结态>联结态>游离态。③连续长期翻压绿肥可使土壤容重减少,孔隙总量和毛管孔隙增加,土壤团粒结构有所改善,土壤中的大、中、小孔隙比例趋于合理,土壤保水性能明显增强。 |
| 关键词: 腐殖质形态 绿肥 容重 田间持水量 |
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| EFFECT OF PLOUGHING IN GREEN MANURE ON THE HUMUS FORMS AND PHYSICAL PROPERTIES OF SANDY LIGHT MEADOW SOILS |
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| Abstract: |
| A long-term local experiment was conducted to study on the effect of ploughing in green manure on the humus forms and physical properties of a sandy li- ght meadow soils.The obtained results show that continuing ploughing in green ma- nure benefits the accumulation of soil organic matter and promotes the transformation of humic substances.The humic acids and humic fractions increased 2.2% and 7.1% separately,and fulvie acid fraction decreased 2.7% in comparison with the check. And HA/FAratios were found rob... |
| Key words: humus forms green manure bulk density field capacity |
