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大千世界里,生物与环境之间、种群之间,在一定的时间内相互依存、相互制约,形成一种既斗争又协调的整体,也就是人们常讲的生态平衡。在维持这个平衡过程中,斗争是异常激烈的,生物之间斗争的利器是“化学武器”,生物在长期生存过程中,为适应复杂环境而产生一种叫次生代谢物的一些化学物质。这些化学物质主要是生物碱、萜类、黄酮类、非蛋白质有毒氨基酸,以及各种甙类、芳香族化合物。这些化学物质对其它生物发生不同影响,有的能为其它植物创造良好的生活环境,这叫“生化相生”,有时则产生不良影响,称之为“生化相克”。 生物之间的“相生”、“相克”,为农业生产上的轮作间种提供了科学依据。一方面要尽量发挥作物之间
In the vast world, between organisms and environment, and between populations, they are interdependent and mutually constrained for a certain period of time to form a whole that is both fighting and coordinating, that is, people often talk about ecological balance. In the process of maintaining this balance, the struggle is extremely fierce. The weapon of struggle between creatures is “chemical weapons.” Creatures produce some chemicals called secondary metabolites to adapt to the complex environment in the long run. These chemicals are mainly alkaloids, terpenes, flavonoids, non-protein toxic amino acids, and a variety of glycosides, aromatics. These chemicals have different effects on other organisms, some can create a good living environment for other plants, called “biochemical”, sometimes adversely affected, called “biochemical g”. Biological “between”, “phase g”, for the agricultural production of intercropping provides a scientific basis. On the one hand to maximize the crop