基底条件和栽培方式对芦苇和香蒲生长发育的影响

在太湖西五里湖湖滨带生态恢复示范工程区，通过人工栽培的方法研究了3种基底条件和2种栽培方式对芦苇和香蒲生长发育的影响. 结果表明，在不考虑波浪影响的条件下，芦苇在原状土基底上成活率较高，在生土和生土上覆湖泊底泥基底上，芦苇成活率较差. 芦苇群落侧重于靠增加其分蘖数来提高对植物地上部生物量的贡献，而香蒲则利用增加地上部分的高度来提高对植物地上部生物量的贡献. 以西五里湖湖泊底泥作为回填土处理比采用原土回填的方式更有利于芦苇的生长发育. 由于试验选用的香蒲根部比重较大，营养吸收能力强.试验期间，基底条件和回填土处理对单株种植的香蒲成活和生长发育影响不大. 单株种植的芦苇成活率、日生长量以及地上部株高增量均不如单株种植的香蒲.虽然芦苇分蘖数较多，但从总体上看，芦苇不适合单株种植. 

Effects of Substrate Condition and Cultivated Way on the Growth of Phragmites australis Trin. and Typha angustifolia L.

A research on two kinds of emergent plants using a way of transplant was conducted in the lakeshore restoration demonstration zone of Lake Wulihu, with the purpose to investigate the effect of three substrate types and two cultivated ways on the growth of Phragmites australis Trin. and Typha aagustifolia L.. Without considering the influence of wave, Phragmites australi~ Trin. got a higher survival rate on the hard soil than immature brown clay and immature brown clay covered with lake mud. Increasing shoot height and developing the number of tillers were two of the methods that could increase above-ground biomass. The former contributed more to the TyphaangustifoliaL and the latter was significant for Phragmites australis Trin.. The result indicated that, compared with filled back with soil from the substrate, filled with lake mud was more suitable to Phragmites australis Trin.. With a more powerful root system, Typha angustifolia L. had a higher absorbing capability for the nutrients, and thus its survival and growth were not correlated with substrate condition and backfill soil during experimental time. Apart with each other and cultivated separately,. Phragmies australis Trin. was inferior in developing its survival rate, daily growth rate and shoot height than Typha angustifolia L.. In despite of larger number of shoots, it was proved not to be a suitable way to plant Typha angustifolia L. separately.