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人教版高中生物学选修Ⅰ“微生物的培养与应用”专题中有几个问题困扰着学生和教师,其中几个问题说法不完全科学。笔者通过查阅大量资料,结合专家意见,将其中的几个问题整理出来,供大家参考。一、尿素能直接被植物吸收传统的理论认为:植物利用尿素作为氮源是因为尿素易被土壤中微生物产生的脲酶水解为CO_2和NH_3,而NH_3可以作为直接氮源被植物吸收。这一传统理论导致人们忽略了植物能够直接吸收尿素分子的可能性及其
People PEP version of high school biology elective Ⅰ “training and application of micro-organisms” There are several problems plaguing students and teachers, several of which are not entirely scientific. The author through access to a large amount of information, combined with expert opinion, will be one of several issues sorted out for your reference. First, the urea can be directly absorbed by plants Traditional theory that plants use urea as a nitrogen source because urea is easily hydrolyzed by microorganisms in soil urease to CO_2 and NH_3, and NH_3 can be absorbed as a direct source of nitrogen plants. This traditional theory led people to ignore the possibility that plants can directly absorb urea molecules and their