Research in Herbosa Succession Process Based on Soil Fertility Evolution

Ecological adaptation of plants is the result of mutual interaction between plants and their surrounding environment. It reflects not just the adaptive ability of plants, but also the effect of environment on the plant community. In agro-ecosystems, soil conditions tend to change under long-term fertilization that loads natural selection pressure on weeds. And then the weed occurrence frequency, weed community component and diversity, and weed seed bank were further influenced by reconstructed interspecific competition relationships. To study the effect of soil fertility on weed succession, three experimental sites were established in 2008 by Wuhan Botanical Garden, Chinese Academy of Science in Honghu and Yichang counties of Hubei, and Fuzhou city of Fujian. A biodiversity survey of farmland weed communities at the sites was conducted, including species, species coverage, and modular traits of some species in different seasons.

Results of the survey compiled in 2011 revealed that there were 54 species of 25 families, 49 species of 18 families, and 45 species of 20 families of weed in the three sites. Different soil and environmental conditions had different weed species with different dominant species. For example, in Fujian, dominant species were Biden pilosa, Erigeron annuus, Imperata cylindrical, and Rublaceae cordifolia, while in Honghu, dominant species were Humulus scandens, Setaria faberii, Glycine soja, Artemisia annua, and Artemisia princeps, and in Yichang, dominant species were Cynodon dactylon, Erigeron annuus, Lindernia ciliate, Setaria faberii, and Bidens pilosa. Hubei-34