不同类型土壤对柑生长结果的影响

The Effect of Different Types of Soil on the Growthand Fruiting of Penggan

于2002年和2003年测定了湖南西部红砂土、红泥土和紫色土9年生枳砧柑园土壤物理性状、化学性状以及柑的生长结果情况.结果表明:3种土壤有机质含量不足,红砂土和红泥土速效氮、磷偏低,紫色土速效氮、磷含量不足;紫色土、红砂土速效钾适量,红泥土速效钾缺乏;紫色土有效钙、镁含量充足,红砂土与红泥土二者有效钙、镁缺乏;除红砂土和红泥土有效铁、有效锰含量充足外,其他所测微量元素缺乏,因而柑产量不高,果实达不到优质果标准;3种土壤类型中,红砂土整体营养水平较高、土质疏松,因而红砂土柑产量和品质都优于紫色土和红泥土.

<Abstrcat>The physical and chemical characters of the red-sandy soil, red earth soil, purplish soil in western Hunan Province in which the 9-year old Penggan planted, and the growth-fruiting were measured in 2002 and 2003 separately. The results showed that organic matter in the three types of soil was deficiency; the valuable N and valuable P_2O_5 was lower than the standard content; the valuable N and valuable P_2O_5 in purplish soil was not enough; the valuable K in both purplish and red sandy soil were medial, deficiency in red Earth soil; the valuable Ca, Mg in purplish soil was enough and that of red sandy soil, red earth soil were much lower than standard contents; the valuable Fe,Mn in red sandy soil and red earth soil were enough, but all the other micro-elements measured were seriously deficiency. Therefore, Penggan planted in three types of soil got lower output and quality of the fruit was poor. The total nutrition level in the red sandy soil was higher, and the terrene was looser than that of both the red earth soil and purplish soil. So, the output and quality of Penggan in red sandy soil was better than that of the other types of soil.