赣南脐橙果园水土流失现状调查分析

Investigation and Analysis on the Present Situation of Soil Erosion in Gannan Navel Orange Orchard

为全面摸清赣南脐橙果园水土流失状况，为政府部门宏观决策提供科学依据，采取实地调查与统计分析相结合的方法，就赣南脐橙果园水土流失分布、程度展开调查，结果表明：赣南脐橙果园水土流失总面积10．97万hm2，占果园总面积的92％；流失强度其中轻度流失占53．92％，中度流失占33．62％，强度流失占12．46％，以轻度、中度流失为主、且主要发生在3～7a及7a以上的果园，1～3a果园水土流失以强度为主；流失量高达360．20万t，流失区域根据平均侵蚀模数划分了5类，信丰属于平均侵蚀模数最轻区域，崇义县属于侵蚀模数最重区域。

In order to comprehensivly understand soil erosion in Gannan navel orange orchards, and provide a scientific basis for decision-making for the government, this article investigated the soil erosion in Gannan navel orange orchards based on field survey and statistical analysis. The results show that the total area of soil and water loss in Gannan navel orange orchard is 109 700 hm2 , accounting for 92% of the total area of the orchard, 53.92% for mild erosion intensity, 33.62% for moderate erosion, 12.46% for the intensive erosion, indicating that mild and moderate erosion was the major erosion pattern and mainly occurred in the orchards with more than 3;7 years and 7 years, soil and water loss in the orchard of 1;3 years is intensive, the loss rate was up to 3. 602 million tons, erosion area was divided into 5 kinds. Xinfeng belongs to area with the least average erosion modulus, Chongyi belongs to area with the greatest erosion modulus.