旱作大田块风蚀物中有机质变化特征研究_陈健.pdf

河南农业科学, 2011, 40( 8) : 120- 124 Jo rnal of Henan Agric lt ral Sciences 1 2 1* 3 1 陈 健 , 彭 乾 , 常春平 , 苏振生, 梁 剑 ( 1. , , 050016; 2. , 300071; 3. , 050016) : 土壤有机质的含量与土壤肥力水平是密切相关的, 通常在其他条件相同或近似的情况 , 在 一定含量范围内, 有机质的含量与土壤肥力呈正相关因此, 对留茬地和翻耕地块沿盛行风向风沙 流结构进行试验观测, 分析风蚀物的有机质变化特征, 结果表明, 这两类农田风蚀物有机质含量在 垂直高度上的变化均遵循线性规律变化, 随高度增加, 风蚀物中有机质含量增加; 留茬地在 20 cm 高度内各集沙点风蚀物有机质特征值(B ) 均小于1, 20~ 60cm 高度内大于1; 翻耕地在各集沙点高 度内B 均小于1因此, 在河北坝上地区退耕林灌草地和耕地基本各自集中成片分布的情况 , 留 茬耕作仍是一种防治旱作大田块农田风蚀沙化的有效耕作措施 : 旱作大田块; 留茬地; 翻耕地; 风蚀物有机质; 变化特征 : S158 : A : 1004-3268( 2011) 08-0120-05 Research on the Variation of Organic M atters in the Dry Field Erosion 1 2 1* 3 1 CHEN Jian , PENG Q ian , CHANG Ch n-ping , SU Zhen-sheng , LIANG Jian ( 1. College of Reso rces and Environmental Science, H ebei Normal Universit y, H ebei Key Laboratory of Environmental Change and Ecological Constr ction, Shijiazh ang 050016, China; 2. College of Environmevtal Science and Engineering of Nankai University, Tianjing 300071, China; 3. National Instity te of H ebei Normal University Affiliated, Shijiazh ang 050016, China) Abstract: The content of soil organic matter and soil fertility levels are s ally positively correlated in a certain range nder the conditions of the similar circ mstances. The sand flow str ct re along the pre- vailing wind in st bble and tillage land was tested, and the variation of the organic matter in erosion was analyzed. The res lts show ed that the organic matter content in these two fields changed in the vertical direction follow ing a linear law, and with t