Allelopathy research in mainland China

In China, the allelopathy research has been done oil various aspects viz., crop-crop interactions, weed-crop interactions, weed management, agroforestry, pastures and grasslands and agroecosystems. The allelopathic effects of crops (wheat, Triticum aestivum L., soybean, Glycine max Merril), weeds (rice and Echinochloa crus-galli; wheat and Digitaria ciliaris (Retz.) Koel), trees, and miscellaneous spp. have been studied in laboratory bioassays, pot cultures and field studies. Wheat allelopathy research were conducted both in laboratory and field condition since wheat-maize rotation system is very common in North China. Wheat straw mulching Oil coming maize field was recommended by governmental behavior. Several research groups have conducted research on soybean allelopathy because continuous cropping in Northeast of China and some of the allelochemicals were identified. In weed-crop interactions allelopathic effect of Bidens pilosa, Ambrosia trifida, Pedicularis longiflora, Ageratum conyzoides, Eupatorium adenophorum and Miscellaneous weed species were reported. In agro-forestry systems allelopathic effect of some Poplar and Eucalypus species were listed. Autotoxicity of Chinese-fir and Pinus massoniana, Cunninghamia lanceolata (Lamb.) Hook. and Casuarnia equisetifolia was studied by some of the Chinese allelopathy researchers. In the natural communities allelopathic effect of Dicranopteris dichotoma (Thumb.) Bernh, Woodwordia japonica (L.f.) Sm. and Hicriopteris glauca (Thumb.) Ching., Chinese wedelia (Wedelia chinensis (Osbeck) Merr.), Dicranopteris pedata (Houtt.) Nakaike, Stellera chamaejasme L., Artemisia ordosica were conducted. Stellera chamaejasme is a natural grassland degradation indicator weed in North of China. Research achievements and further research requirements for China are discussed in this paper.