| 蔗园土壤速效磷丰缺临界值的研究 |
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| 引用本文： | 谢如林,黄献华,谭宏伟,周柳强,黄美福,黄金生,董文斌.蔗园土壤速效磷丰缺临界值的研究[J].热带作物学报,2009,30(3):304-308. |
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| 作者姓名： | 谢如林 黄献华 谭宏伟 周柳强 黄美福 黄金生 董文斌 |
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| 作者单位： | 广西农业科学院土壤肥料研究所,南宁,530007 |
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| 摘 要： | 以赤红壤为研究对象,通过甘蔗盆栽试验,利用Olsen和Mehlich3方法,研究甘蔗土壤速效磷的临界值及丰缺情况.结果表明:当土壤Olsen-P含量低于13.7 mg/kg或Mehlich3-P含量低于15.4 mg/kg时,甘蔗植株的生长量随土壤速效磷含量的增加而显著增加.甘蔗地上部干物质相对产量与土壤速效磷含量的关系可以用一元二次响应方程来拟合,Olsen-P的响应方程为:y=0.319 8x2+12.263x-15.471,决定系数R=0.9767**;Mehlich3-P的响应方程为:y=0.236 6x2+10.532x-12.794,R=0.975 8**.以最高产量的95%作为临界产量,计算得到蔗园土壤Olsen-P和Mehlich 3-P丰缺临界值分别为14.5、16.0 mg/kg.
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| 关 键 词： | 甘蔗 土壤速效磷 丰缺临界值 |
Critical Level of Soil Available P in Sugarcane Grove |
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| Xie Rulin,Huang Xianhu,Tan Hongwei,Zhou Liuqiang,Huang Meifu,Huang Jinsheng and Dong Wenbin.Critical Level of Soil Available P in Sugarcane Grove[J].Chinese Journal of Tropical Crops,2009,30(3):304-308. |
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| Authors: | Xie Rulin Huang Xianhu Tan Hongwei Zhou Liuqiang Huang Meifu Huang Jinsheng and Dong Wenbin |
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| Institution: | Xie Rulin,Huang Xianhua,Tan Hongwei,Zhou Liuqiang,Huang Meifu,Huang Jinsheng,Dong Wenbin Soil , Fertilizer Institute,Guangxi Academy of Agricultural Sciences,Nanning,Guangxi 530007 |
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| Abstract: | Under pot sugar culture conditions, soil available P content was determined by using Olsen and Mehlich3 methods. When the soil Olsen -P content was lower than 13.7 mg/kg or the soil Mehlich3 P content lower than 15.7 mg/kg, the growth of sugarcane was increased significantly with an increase in the soil available P content. The relationship of the dry matter weight of sugarcane above the ground and the soil available P content was fit by univariate quadratic equations. The equation for Olsen-P content was y... |
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| Keywords: | sugarcane soil available P critical level |
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