紫色土农林复合经营土壤理化性状研究  

Study on Soil Physical and Chemical Properties of Agroforestry of Purple Soil

作　　者：夏青[1] 何丙辉[1] 谢洲 蔚远中 

机构地区：[1]西南农业大学资源环境学院,重庆400716 [2]重庆市财政局,重庆400015 [3]合川市水利农机局,重庆合川市401520

出　　处：《水土保持学报》2006年第2期86-89,共4页Journal of Soil and Water Conservation

基　　金：国家自然科学基金资助(批准号40201032);重庆市科委自然科学基金资助(合同编号9219);重庆市农发水土保持科研资助项目

摘　　要：对合川市紫色土区7种农林复合经营模式的土壤理化性状进行了试验研究，结果表明；与纯林相比，农林复合生态系统能够有效地改善土壤养分在垂直空间上的分布，对不同深度土壤的理化性状均有所改善，特别是20～40am土层；不同复合年限的系统对土壤的改良效果不同．复合4年的枇杷一西瓜复合系统效果明显好于复合2年的系统．前者0～20cm土层的全N含量比后者高41．67％，20～40cm土层的有机质含量比后者高43．23％，40～60cm土层的全K含量高23．41％；不同复合品种的系统同样也有不同的效果，柚子—苋菜系统对土壤物理性质的改良效果最好．该系统土壤中的N素和P素含量高于柚子—粉葛系统，K素含量则低于柚子—粉葛系统，而柚子—玉米复合系统对土壤的改良效果总体上不如前两个系统。Soil property of seven agroforestry systems were conducted in purple soil region of Hechuan. The results show that ：compared with pure forest, agroforestry systems can availably change the vertical distribution of soil nutrient and improve soil physical and chemical properties in different soil depth especially in 20～40 cm; the effect of soil improvement is vary with composite time, Loquat-Watermelon system has been managed for 4 years is better than the one has been managed for 2 years,total nitrogen in 0～20 cm of the first system is increased 41.67% times over that of the latter, organic matter in 20～40 cm is increased 43.23%, and total kalium is inceased 23.41%; intercropping variety also affect the effect, Grapefruit-Edible Amaranth is the best one of the three agroforestry systems in improving soil physical properties, and its soil N and P contents are higher than Grapefruit-Radix Puerariae system, but K content is lower. Grapefruit-Corn system is inferior to Grapefruit-Radix Puerariae system,Grapefruit-Edible Amaranth system as a whole.

关 键 词：农林复合系统 紫色土 土壤性状 

分 类 号：S157.2[农业科学—土壤学] S153[农业科学—农业基础科学]