论文部分内容阅读
水稻田里常有伴生的稗草,正好象粟地里常有狗尾草、麦地里常有野燕麦一样。水稻有早稻、早中稻、中稻和晚稻等不同类型,稗草也有着早稗、早中稗、中稗和晚稗等不同类型,各与相同类型的水稻相伴生,几乎难舍难分。而且这些不同类型的稗草,对生长发育所要求的条件,也各与相伴生的水稻类型差不多。比如早稗和早中稗,对光照的反应与早稻、早中稻一样,不很敏感,因此也能与晚稻相伴生。而晚稗对光照的要求,就与晚稻一样严格,要渡过一段短日照的条件,才能抽穗結实,因此它就不可能与早稻或早中稻相伴生。
Paddy grass often associated with paddy fields, just as often in the field of Setaria horns, wheat fields often have the same oats. Rice has different types of early rice, early middle rice, middle rice and late rice. Barnyardgrass also has different types of barnyardgrass, barnyardgrass, barnyardgrass and barnyardgrass, which are almost always associated with the same type of rice. And these different types of barnyardgrass, the conditions required for growth and development, and the accompanying types of rice are similar. For example, barnyard grass and barnyardgrass, the response to light and early rice, as early as middle-aged rice, is not very sensitive, it can also be associated with late rice. And barnyardgrass requirements of light, as late rice as strict, to spend a short period of sunshine conditions, in order to erect, so it can not be associated with early or early rice.