为了摸索覆盖物对雷竹地土壤养分变化的影响，设立了不同覆盖材料对比试验。结果表明：①稻草、稻草＋砻糠、竹叶３种覆盖处理，到试验的５０ｄ土壤有机质、全氮含量开始明显减少。前２个处理这种减少趋势一直维持到试验结束。试验全过程中土壤有机质、全氮分别减少了７２８ｇ·ｋｇ－１，９５５ｇ·ｋｇ－１和０５０ｇ·ｋｇ－１，０５７ｇ·ｋｇ－１。竹叶处理则到１００ｄ有机质、全氮又分别上升。②土壤水解氮３种覆盖处理均在５０ｄ达到峰值，此后，稻草和稻草＋砻糠处理快速下降，到１００ｄ时分别只有５０ｄ时的５７６８％和５５７１％，但竹叶处理到试验结束仍维持较高水平。③土壤盐基总量和ｐＨ值同步，３种处理均在试验的７５ｄ达到高峰，以后又重新回落。图４表７参５ In order to explore the impact of mulching on the changes of soil nutrients in thunder bamboo, a contrast test of different covering materials was established. The results showed that: ① straw, straw + bran, bamboo three kinds of cover treatment, to test the 50d soil organic matter, total nitrogen content began to significantly reduce. The decreasing trend of the first two treatments has been maintained until the end of the experiment. Soil organic matter and total nitrogen decreased by 728g · kg-1, 955g · kg-1 and 050g · kg-1, 057g · kg-1 respectively in the whole experiment. Bamboo leaves treatment to 100d organic matter, total nitrogen were increased. (2) The three treatments of soil hydrolyzed nitrogen peaked at 50 days, and thereafter, the treatment of rice straw and rice bran decreased rapidly, reaching 5768% and 5571% respectively at 50 days after 100 days. However, The end still maintain a high level. ③ The total amount of soil base and pH value synchronization, three kinds of treatments are in the test peaked at 75d, and then come back down again. Figure 4 Table 7 参 5