| 张红,吕家珑,赵世伟,周群,陈小燕.不同植被覆盖下子午岭土壤养分状况研究[J].干旱地区农业研究,2006,(2):66~69 |
| 不同植被覆盖下子午岭土壤养分状况研究 |
| Studies on soil nutrients under different vegetation types in the Ziwuling Area |
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| DOI：10.7606/j.issn.1000-7601.2006.02.15 |
| 中文关键词: 子午岭 植被类型 土壤养分 |
| 英文关键词:Ziwuling Area vegetation types soil nutrient |
| 基金项目:“973”项目(2005CB121102)； 教育部博士点基金项目(20040712001)； 黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-138) |
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| 中文摘要: |
| 以黄土丘陵沟壑区的子午岭次生林区为研究区域,研究了不同植被覆盖对土壤养分状况的影响。结果表明:不同植被类型覆盖下,土壤有机质含量为乔木>灌木>草本>农田>弃耕地。土壤全氮含量为乔木≥草本>灌木>农田≥弃耕地;全磷含量变化不大,其中农田土壤全磷含量最高;全钾含量为乔木>灌木>草本>农田>弃耕地;土壤碱解氮含量为乔木>灌木≈草本≥农田>弃耕地;速效磷含量为乔木≈灌木≈农田>草本>弃耕地;速效钾含量为乔木≥草本>灌木≥农田>弃耕地。由此可见,随植被演替阶段的提高,不同植被覆盖下土壤的养分含量逐渐升高。因此,在黄土高原丘陵区,坡地退耕还林,恢复植被,可以有效改善土壤养分状况。 |
| 英文摘要: |
| This study has analyzed the soil nutrients under different vegetation types in the Ziwuling Area.The results showed that the vegetation types made a remarkable effect on the soil nutrient content.The changing trend was that the content of total N,K and available N,P,K was basically in the order of trees>brush>grassland>farmland>abandoned field,which accorded with the vegetation succession.In addition,the total P content among the farmland,abandoned field,grass,bush and forest was rather steady.Therefore,in the hill of the Loess Plateau,converting cropland to forestland and grassland is good for improving the conditions of soil nutrient. |
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