| 黑土农田养分供应能力和变化 |
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| 引用本文： | 王建国,刘鸿翔. 黑土农田养分供应能力和变化[J]. 土壤学报, 1997, 34(3): 295-301 |
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| 作者姓名： | 王建国 刘鸿翔 |
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| 作者单位： | 中国科学院黑龙江农业现代化研究所 |
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| 摘 要： | 本文通过５年的定位试验研究结果表明：松嫩平原典型黑白农田养分自然供给力Ｎ素为９０％左右，Ｐ素为９５％以上，Ｋ素达到１００％。农田土壤中Ｎ素的释放量一般５５－９９ｋｇ／ｈａ．ａ，Ｐ素的释放量一般１４－２６ｋｇ／ｈａ．ａ．，Ｋ素的释放量一般４８－９３ｋｇ／ｈａ．ａ。尽管黑土农田潜在肥力很高，对于施肥的依赖性也在不断增加。
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| 关 键 词： | 自然供给力 释放量 养分平衡 黑土 |
| 收稿时间： | 1995-08-28 |
| 修稿时间： | 1996-12-03 |
STUDY ON NUTRIENT-SUPPLY CAPACITY OF BLACK SOIL AND ITS CHANGE |
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| Wang Jianguo and Liu Hongxiang. STUDY ON NUTRIENT-SUPPLY CAPACITY OF BLACK SOIL AND ITS CHANGE[J]. Acta Pedologica Sinica, 1997, 34(3): 295-301 |
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| Authors: | Wang Jianguo and Liu Hongxiang |
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| Affiliation: | Heilongjiang Institute of Agricultural Modernization, CAS Harbin 150040;Heilongjiang Institute of Agricultural Modernization, CAS Harbin 150040 |
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| Abstract: | 5-year-fixed experiments indicated that spontaneous nutrient-suppling capacities of typical black soil in Song Nen Plain were: nitrogen, around 90%; phosphorus, over 95%; and potassium, 100%. The amounts of N, P and K released from farmland were 55-99 kg/ha·year, 14-26 kg/ha·year and 48-93 kg/ha·year seperately. Although black soil farmland has rather high potential fertility, its dependence on fertilization is rising gradually. The spontaneous supplying capacity of nitrogen decreased from 90% to 60% in the treatment with no nitrogen appling during the 5 years, and that of phosphorus declined from 95% to 80-90% in the treatment without phosphorus application during the 5 years. |
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| Keywords: | Spontaneous supply capacity The amount of release Nutrient balante |
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