赣南脐橙园土壤酸化特征研究-中柑所在线.PDFVIP

20 10 ; 39 ( 4) : 6~ 8, 13 1 1 1 1 2 梁梅青 , 薛 珺 , 范玉兰 , 李 勋 , 彭良志 ( 1 / , , 34 1000; 2 ) :采集赣南脐橙园土壤 1 405 个农化样和229 个背景样, 研究脐橙园土壤酸度的变化特征 试验结果表明, 与背景土壤 比, 赣南脐橙园农化土壤p H 值平均下降了0 . 4 6 个单位, p H 值 4 . 5 的强酸性农化土壤占样本总数的4 5. 7 % , 比背景样增加了近15 个百分点, 脐橙园土壤普遍酸化; 不同种植年限脐橙园前4 年土壤酸化趋势比较明显; 不同土壤类型pH 值下降最大的是紫色土, 下 降了1. 36 个单位根据脐橙园土壤酸化特征及对脐橙园的现状调查, 分析了土壤酸化的主要原因, 提出了防止脐橙土壤酸化的调控措施 :赣南; 脐橙园; 土壤 pH 值; 土壤酸化; 调控 :S 6661 4 :A :1007- 143 1( 2010) 04- 0006- 04 Studies onSoil Acidification of Navel Orange Orchards in Gan- zhouCity, Jiangxi Province L I A N G M e i-qing 1 , X UE J un1 , FA N Yu- lan1 , L I X un 1 , PEN G L i ang-z h i2 ( 1 R es earch Cen ter of N avel Oran ge Eng n eer ng and T ech nology - J angx , G ann an N ormal U n vers t y , G an- z hou, 34 1000; 2 C t rus Research Ins t t ut e , C h nes e A cademy of A gr cult ural S c ences) Abstract: Changes n so l p H v alues w ere nvest g ated by analyz ng 1 405 so l samples from navel o r- ang e o rchards and 229 near by v r g n so l samples n Ganzho u c t y, J ang x pr ov nce. T he results sho w ed that the av erag e pH of the o rchard so ls w as 0 . 46 un t low er than that o f the v rg n so ls . T he pH values o f 45 . 7 % o f the or char d so ls w ere low er than 4. 5, and the per centag e w as 15 per- cent h g her than that of the v r g n so ls . It w as found that a str ong decease n p H values occurr ed n the f rst 4 years after the establ shment o f the new o rchards . For d ff er ent so l ty pes, the g reatest decrease of 1. 36 un t s n pH w as observed n purple so ls . T he f acto rs that led to o rchard so l ac d- f cat on