滇青冈残体分解物对小麦化感作用测定

Determination of Allelopathic Effects of Residue Decomposition of Cyclobalanopsis glaucoides on Triticum aestivum

摘要: 为探索滇青冈化感物质的释放途径，研究了滇中地区滇青冈残体分解物水浸液对小麦种子及其幼苗的化感作用。结果表明：滇青冈残体在土壤中的分解时间和埋藏深度对小麦种子萌发率和幼苗叶片中叶绿素含量及其幼苗生长的部分指标(根长、苗高、根数目、幼苗鲜重和干重)都具有抑制作用。研究发现，伴随着滇青冈茎和叶在土壤中分解时间(TSLB)的延长，其残体分解物水浸液对小麦种子萌发和幼苗叶片中叶绿素含量及其幼苗生长的抑制效应不断减弱，而滇青冈茎和叶在土壤中埋藏深度(DSLB)的增加，其残体分解物水浸液对小麦种子萌发和幼苗叶片中叶绿素含量及其幼苗生长的抑制效应未呈现出规律性的变化。

Abstract: In order to explore the release pathway of allelochemicals of Cyclobalanopsis glaucoides, allelopathy of extract solution of residue decomposition of Cyclobalanopsis glaucoides in central Yunnan province on seed germination and seedling growth of Triticum aestivum was studied. The results showed that the seed germination percentage, root length, seedling height, number of roots, seedling fresh and dry weight, Chla, Chlb, Chl contents, Chla/Chlb of Triticum aestivum were reduced by the time and depth of stems and leaves buried in the earth of Cyclobalanopsis glaucoides. It was found that the seed germination, seedling growth and Chla, Chlb, Chl contents, Chla/Chlb of Triticum aestivum were increased with increasing time of stems and leaves buried in the earth (TSLB) of Cyclobalanopsis glaucoides, but at this point there was no regular change about depth of stems and leaves buried in the earth (DSLB) of Cyclobalanopsis glaucoides.