課程名稱︰植物營養學 課程性質︰系必修 課程教師︰鍾仁賜 開課學院：生農學院 開課系所︰農化系 考試日期（年月日）︰2011.6.23 考試時限（分鐘）：120分鐘 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 1.Why do the insects or pathogens attack the nutrient deficient plants first rather than the nutrient sufficient ones? (10 points) 2.How do you know the site of nitrate reduction of plants─root or above ground parts? (10 points) 3.Describe the N assimilation procedures from nitrate to the first amino acid produced in plants, including the related enzyme and the organs or organelle where the reactions take place. (10 points) 4.Why do the dry weight of plant increase mostly in day and the height increase in night? (10 points) 5.In which organ is the sulfate mainly reduced? What form of sulfur can be cycled via phloem in order to cover root demand? What compound is the first stable product in which sulfur is present in a reduced organically bound form? (10 points) 6.Describe the main symptoms of following nutrient deficiency of plants: nitrogen, phosphorus, and potassium. (10 points) 7.The potassium concentration in the stems of plants is usually higher than that in roots or leaves, why? (10 points) 8.Describe root pressure, indicate when it might occur and how to know the existence of root pressure. (10 points) 9.Explain the following terms: (20 points) (1)system and product (2)secondary metabolites (3)pressure flow (4)apical dominance (5)calcicole and calcifuge (6)biological yield (7)leaf area index (8)lime induced chlorosis (9)the first and the second sink (10)phytosiderphore --

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