摘要
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７２８ｇ·ｋｇ－１，９５５ｇ·ｋｇ－１和０５０ｇ·ｋｇ－１，０５７ｇ·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５７６８％和５５７１％，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。
After analysing dynamic changes of chemical properties of soil covered with
rice straw,rice straw plus rice chaff and bamboo leaves(treatment No.1,No.2,and No.3
respectively)in Phyllostachy praecox forests,three points were concluded.By the day
50,contents of soil organic matter and total nitrogen had begun to reduce obviously.The
first two treatments remained this tend until the end of experimtnt(the totalreducedvalues
of two contents were 728 gkg-1 955 gkg-1 and 050 gkg-1,057 gkg-1 respectively).The
two contents of the third treatment,however,increased again by the end of the
experiment.The peak value of hydrolyzable nitrogen in three treatments apeared on the
day 50,afterwards,the value began to decrease with day rapidly in the first two
treatment(only 5768% and 5571% compared with the peak value at the end of the
experiment).The hydrolyzable value of third treatment decreased slowly.Contents of
exchangeable base and pH value in three treatments appeared the same dynamic
tends.After the peak value on the day 75,they went down again.
出处
《浙江林学院学报》
CSCD
1999年第2期123-130,共8页
Journal of Zhejiang Forestry College
基金
浙江省教育委员会基金
关键词
雷竹
覆盖
土壤化学
化学性质
动态
Phyllostachys
praecox
soil chemistry
chemical properties
kinetic state
