| 连续施肥对土壤磷钾组分变化的影响 |
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| 引用本文： | 张漱茗,于淑芳,刘光栋,阎华.连续施肥对土壤磷钾组分变化的影响[J].植物营养与肥料学报,2000,6(4):375-382. |
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| 作者姓名： | 张漱茗 于淑芳 刘光栋 阎华 |
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| 作者单位： | 1.山东省农业科学院土壤肥料研究所 山东济南250100 |
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| 摘 要： | 以 10年肥料定位试验土壤为材料 ,研究了连续施肥对 3种土壤磷钾组分含量的影响。结果表明 ,连续施用NPK化肥、化肥基础上增施有机肥 ,均可提高土壤有机磷总量、无机磷总量、全钾含量及其它各组分 (形态 )的含量。有机磷总量平均分别提高 0.34倍和 1.08倍 ,其中AOP提高 1.71倍和 2.45倍 ;无机磷总量分别提高 0.40倍和 0.47倍 ,其中Ca2-P提高 6.3倍和 7.69倍 ;全钾含量提高很少 ,但水溶性钾提高 6.88倍和 11.17倍。连续 10年不施肥土壤磷钾总量及各组分含量均降低。连续施钾与不施钾 ,土壤粘粒X射线衍射图谱没有明显差异 ,但不施K肥土壤粘粒 ( 2 m)全钾含量降低
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| 关 键 词： | 连续施肥 土壤磷钾组分 |
| 修稿时间： | 1999-04-06 |
Different fractions of phosphorous and potassium in soils as affected by successive fertilization |
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| ZHANG Shu-ming,YU Shu-fang,LIU Guang-dong,YAN Hua.Different fractions of phosphorous and potassium in soils as affected by successive fertilization[J].Plant Nutrition and Fertilizer Science,2000,6(4):375-382. |
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| Authors: | ZHANG Shu-ming YU Shu-fang LIU Guang-dong YAN Hua |
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| Institution: | 1.Inst. of Soil and Fertilizer;Shandong A A S;Jinan 250100 |
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| Abstract: | Changes of three different fractions of phosphorous (P) and potassium(K) in soil with 10 years successive fertilization were studied. The results showed that three years application of both NPK and NPK plus OM (organic manure) increased the total organic P (OP) and by 1.34 and 2.09 times in all three test soils. Of OP,the active OP content rose up to 2.71 and 3.45 times as in the original soils, moderately active OP to 1.42 and 1.58, highly active OP to 1.28 and 1.41 times, respectively. During the same period, the inorganic P (IP) increased by 1.4 and 1.47 times, respectively. Of IP, the Ca2-P rose up to 7.37 and 8.69, Ca8P to 1.99 and 2.15, Al-P to 3.67 and 4.06, Fe-P to 2.29 and 2.36, O-P to 1.21 and 1.4, Ca10P to 0.96 and 0.97 times, respectively. As for the total K in the test soils, both NPK and NPK plus OM fertilization practices changed K contents, which were 1.02 and 0.999 times that of the original soils. The fraction of soluble K rose to 7.88 and 12.17, non-specific adsorbed K to 1.82 and 2.31, rapidly available to 1.49 and 1.85, slowly available to 1.04 and 1.23, mineral K to 1.012 and 1.015 time, respectively. In contrast, each fraction of P and K declined in all non fertilized soils. X-ray diffraction diagrams indicated that K?containing minerals as mica had little changes when K applied. However, the total K in the clay fraction (2m) tended to decline without K application. It is assumed that part of the adsorbed K by crops probably come from mica and the like minerals. |
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