水稻化感作用及其生理生化特性的研究

选用具有强化感作用的6个水稻品种为供体，大田稗草为受体，研究了水稻化感作用及生理生化特性，结果表明，提高水稻叶片浸提液浓度，可以相应增强对稗草生长的抑制效果，这种抑制效果与杂草的种植密度呈负相关；化感水稻叶片浸提液能显著抑制物质稗草体内超氧化物歧化酶（SOD）和过氧化氢酶（CAT）的活性，从而影响其生长；苯丙氨酸氨解酶（PAL）的活性大小与酚类物质的含量吴正相关；多种酚类物质的化感作用之间可能是增效的，也可能是拮抗的。

Rice allelopathy and its physiobiochemical characteristics.

Selecting six strong allelopathy rice varieties as donor plants,barnyardgrass as receiver plant,authors dealt with the allelopathy and physiobiochemical characteristics of rice.The results show that increasing the extract concentration enhanced the inhibition effect on the growth of barnyardgrass.The inhibition effect was negatively correlative with the target weed densities.The aqueous extracts of rice leaves significantly inhibited the activities of superoxide dismutase and catalase in barnyardgrass,therefore affected the growth of barnyardgrass.The activity of PAL was positively correlative with the content of phenolics.The interaction of phenolic compounds might be additive or antagonized.