水稻植株状况对甲烷传输速率的影响及其品种间差异

以不同水稻品种为材料，通过实验室手段测定各品种水培稻株甲烷传输速率，研究水稻品种间甲烷传输能力的差异及原因；通过控制甲烷排放路径，研究水稻植株状况对甲烷传输的影响。结果表明i在品种演进过程中，稻株甲烷传输速率逐渐增大(南京1号偏小除外)，根氧化力与甲烷传输速率趋势一致。苗期甲烷有50％是经叶片传输的；剪根后甲烷传输速率随之改变，留根条效、根重与甲烷传输速率的变化均呈明显的线性正相关。植株茎蘖效对甲烷传输有影响，在一定的范围内，植株茎蘖越多，甲烷传输速率越大。这说明根氧化力是造成品种间甲烷传输速率不同的主要原因。植株生长健壮，叶片多，根系发达，茎蘖多，植株甲烷传输速率大。

Effect of Rice Plant Status and Difference Rice Varieties on Methane Transport Rate

The difference of methane transport ability and its reasons were clemonstrated by detecting different rice varieties,which grow in water-nutrient solution cultivation.In the same time,the influence of paddy rice satus on methane transport was demonstrated by controlling the methane transport path. The main results were as follows: with the evolution of Indicia rice varieties, Methane transport rate of plant increased, the root oxidizes increased gradually. In seedling stage, leaves transported 50 percent of methane. Methane transport rate varied with the number of root and the dry weight of root. They were obviously and lineally correlated. The number of stems and tillers of plant affected methane transport rate. In a certain range, the more the stems and tillers, the higher methane transport rate. These results indicate that root oxidizes mostly cause difference of methane transport rate in rice varieties. Healthy plant, more leaves, root system upgrowth, more stem and tiller cause more methane transport rate.