The root length and number of the roots from the aquatic culture of Faucaria tigrina were studied as criteria to compare the influence of different treatments including derooting,varied intensity of solar radiation and nutritive solution on the aquaculture.

Under established the induction system of female flower,biochemical change and construction of female flowers in shoots of derooted seedlings of Cucumis sativus L.

This paper reported the synergistic ef- fect of KT and IAA,and the effects of age of seedlings,length of hypocotyls,nitrogen contents and NH 4+-N/TN ratio on the induction of female flowers in derooted seedlings of Cucumis sativus L.

In order to determine the possibility of measuring the root respiration by using root exclusion method,we conducted field experiments to measured total soil respiration and net soil respiration in three temperate grassland communities including Leymus chinensis free-grazed steppe,stipa grandis free-grazed steppe and Leymus chinensis degenerated free-grazed steppe in the growing season, 2005.