桂西北肯福环境移民示范区园地土壤肥力变化状况

果树业作为肯福环境移民示范区的一项长期的云集产业，在示范区移民的生产、生活中起着不可缺少的作用。为了解示范区园类用地（主要是宜果类用地）开发利用对土壤肥力变化的影响，以便更好地指导移民进行合理的综合性开发，特对开垦前（1996年上半年，此时移民也开始迁入）和开垦后第三年（1998年下半年）示范区的园类用地土壤养分变化进行了调查研究，分析了耕层土样的8个土壤养分指标，结果表明：示范区园类用地土壤肥力整体上基本保持不变，但表现出微弱的下降趋势；其中的长绿果树地土壤肥力略有下降，而落叶果树地土壤肥力有极微的上升趋势；不同的土壤养分元素含量变化又有差异。

The Status of Soil Fertility Changes of Garden Plot in Kenfu Demonstration Area of Environmental Immigrants,Northwest Guangxi

Fruits were selected for the long term mainstay industry of demonstration area,and it will play an important role in agricultural production and everyday life of immigrants.In order to understand the influence of garden plot utilization and exploitation on soil fertility changes in Kenfu demonstration area of environmental immigrants,some studies and investigations were made on slil nutrients changes of demonstration area.Analysis of soil samples collected in 1996 and in 1998 were also carried out.Then according to the statistics methods and comparison,the results showed that the soil fertility level of 1998 decreased slightly compared with that of 1996,but the changing trends of the soil fertility level of two types of fruits lands in garden plot were completely opposite,And the changing trends of different indexes of soil nutrients were not also absolutely similar.Based on these studies,the current garden plot utilization patterns in Kennfu demonstration area should be regulated reasonably and the benefit of land production should be also improved.At the same time,just by so doing,the soil fertility of garedn plot can be maintained and increased and the high efficient sustainable land use can be achieved.