论文部分内容阅读
在2012年6-9月期间,以草地早熟禾草坪为对照,研究了3种土壤水分含量对■草草坪生态生理特征的影响,结论如下:1)■草最大草群高度低于20cm,平均分蘖数为63个/株,草屑量和根系量分别为草地早熟禾草坪的75.06%和58.54%,表现出明显的低高度、密丛生和对土壤营养物质低消耗的特点;2)同一水分处理下■草叶片含水量、游离脯氨酸含量都分别低于草地早熟禾,■草日均蒸腾速率是草地早熟禾的75.16%,日均水分利用率为草地早熟禾1.32倍,■草草坪群落日平均蒸散率比草地早熟禾草坪低24%左右;3)40%FC处理下■草草坪的株高、分蘖数、盖度、地下生物量都分别显著低于60%FC和80%FC水分处理,但各个生理指标在三个水分处理间均没有显著差异.
During the period from June to September in 2012, the effect of three kinds of soil moisture on the ecophysiological characteristics of V. gramineus turfgrass was studied using the meadow grass as control. The conclusions are as follows: 1) The maximum herbaceous grass height was below 20 cm, The number of tillers was 63 per plant, the amount of cut grass and the root system were 75.06% and 58.54% of the lawn, respectively, showing obvious low height, dense tufts and low consumption of soil nutrients; 2) Under the treatment of ■ grass leaf water content, free proline content were lower than that of bluegrass, ■ grass daily average transpiration rate was 75.16% of Kentucky bluegrass, the average daily water use efficiency was 1.32 times of Kentucky bluegrass grass ■ lawn The average daily evapotranspiration rate of community was about 24% lower than that of Kentucky bluegrass. 3) Under 40% FC treatment, the plant height, tiller number, cover and underground biomass of grass turf were significantly lower than those of 60% FC and 80% FC Moisture treatment, but no significant difference in each physiological index among the three treatments.