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| 西藏不同年限耕地土壤磷素分级研究 | |
| 引用本文： | 王瑞,李晓忠,周志宇,秦彧,姜文清,田发益,陈菊兰. 西藏不同年限耕地土壤磷素分级研究[J]. 草业科学, 2010, 27(11): 13-20 |
| 作者姓名： | 王瑞 李晓忠 周志宇 秦彧 姜文清 田发益 陈菊兰 |
| 作者单位： | 1. 兰州大学草地农业科技学院,甘肃,兰州,730020 2. 西藏自治区农科院,西藏,拉萨,850000 3. 西藏农牧学院,西藏,林芝,860000 4. 内蒙古阿拉善盟畜牧研究所,内蒙古,巴彦浩特,750306 |
| 基金项目： | 国家科技支撑计划资助项目(2007BAD80B05); 国家自然科学基金资助项目(30800801) |
| 摘 要： | 采用Tiessen等修正后的Hedley土壤磷素分级方法对西藏日喀则地区(江孜)及山南地区(琼结)不同开垦年限的耕地以及放牧草地土壤进行磷素分级。结果表明,土壤无机磷库中Dil.HCl-Pi(1 mol/L HCl提取无机磷)Conc.HCl-Pi(浓HCl提取无机磷)NaOH-Pi(0.1 mol/L NaOH提取无机磷)NaHCO3-Pi(0.5 mol/L NaHCO3提取无机磷)H2O-Pi(水溶性磷);随着耕种时间的延长,各无机磷组分都出现增加的趋势,其中Dil.HCl-Pi和Conc.HCl-Pi的增幅相对较大,琼结草地比耕地含有更大的有机磷库,但其无机磷库却相对较小;耕种年限在50年以内的样地,有机磷组分随着耕种年限的延长而降低,但在50年以上的样地又出现上升趋势,即呈"V"字型趋势。NaOH-Po(0.1 mol/L NaOH提取有机磷)与Dil.HCl-Pi呈极显著(P0.01)负相关,与SOC(有机碳)呈极显著(P0.01)正相关;Conc.HCl-Po(浓HCl提取有机磷)与Conc.HCl-Pi呈显著(P0.05)正相关;SOC与Dil.HCl-Pi呈显著(P0.05)负相关;pH值与Dil.HCl-Pi呈极显著(P0.01)正相关,与NaOH-Po和SOC呈极显著(P0.01)负相关。 |
| 关 键 词： | 西藏；耕地土壤；磷素分级；含量特征 |
Soil phosphorus fractions with different reclamation periods in the Tibet Autonomous Region, China |
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| WANG Rui,LI Xiao-zhong,ZHOU Zhi-yu,QIN Yu,JIANG Wen-qing,TIAN Fa-yi,CHEN Ju-lan. Soil phosphorus fractions with different reclamation periods in the Tibet Autonomous Region, China[J]. Pratacultural Science, 2010, 27(11): 13-20 | |
| Authors: | WANG Rui LI Xiao-zhong ZHOU Zhi-yu QIN Yu JIANG Wen-qing TIAN Fa-yi CHEN Ju-lan |
| Affiliation: | WANG rui1,LI Xiao-zhong2,ZHOU Zhi-yu1,QIN Yu1,JIANG Wen-qing1,TIAN Fa-yi3,CHEN Ju-lan4(1.School of Pastoral Agriculture Science , Technology,Gansu Lanzhou 730020,China,2.Tibet Autonomous Regional Academy of Agricultural Sciences,Tibet Lhasa 850000,3.Tibetan agriculture , animal husb,ry College,Tibet Linzhi 860000,4.Institute of Animal Science,Alxa of Inner Mongolia,Inner Mongolia Bayanhot 750306,China) |
| Abstract: | Soils with different reclamation period were collected from Jiangzi Counties of Shigatse region and Qiongjie Counties of Shannan region in the Tibet Autonomous Region,China.Soil phosphorus forms with different reclamation periods and rangeland were analyzed by the method of Hedley revised by Tiessen.The results of this study showed that the inorganic phosphorus fractions ranked in the following order: Dil.HCl-Pi>Conc.HCl-Pi>NaOH-Pi>NaHCO3-Pi>H2O-Pi.Inorganic phosphorus fractions increased with the land recl... |
| Keywords: | Tibet Autonomous Region soil of arable land phosphorus fractionation content characteristics |
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