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为了明确铵态氮和硝态氮营养对谷子形态和生物量的影响,合理选择谷子施氮形式,采用蛭石浇灌不同氮形态营养液的方法培养谷子植株。结果表明:两种氮形态显著影响了谷子形态和生物量累积,氮形态对根形态、穗长的促进作用无显著差异。氮形态在生物量、株高、叶面积、叶绿素含量方面的影响存在显著差异:相比铵态氮,硝态氮分别提高了17%的根重、32%的茎重、39%的叶重和40%的总生物量,硝态氮还提高了38%的株高和40%的叶面积;相比硝态氮,铵态氮提高了173%的叶绿素含量和12%的穗重。氮形态在根冠比和穗比重也存在极显著差异,相比硝态氮,铵态氮显著提高了8%的根冠比和44%的穗比重。以上结果表明,硝态氮显著促进谷子株高、叶面积、生物量的提高,在株体扩建方面发挥重要的作用,铵态氮显著促进谷子叶绿素合成和生殖器官建成,在功能建成方面发挥重要作用。
In order to clarify the effects of ammonium nitrogen and nitrate nitrogen on the morphology and biomass of millet, we selected the millet nitrogen application forms and cultivated millet plants by using vermiculite watering different nutrient solutions. The results showed that the two nitrogen forms significantly affected the accumulation of millet morphology and biomass. There was no significant difference in the effect of nitrogen form on root morphology and spike length. There were significant differences in the effects of nitrogen forms on biomass, plant height, leaf area and chlorophyll content. Compared with ammonium nitrogen, nitrate nitrogen increased root weight by 17%, stem weight by 32% and leaf weight by 39% And 40% of total biomass. Nitrate also increased plant height by 38% and leaf area by 40%. Compared with nitrate nitrogen, ammonium nitrogen increased 173% chlorophyll content and 12% panicle weight. There was also a significant difference in the root morphology and the specific gravity of nitrogen in the nitrogen form. Compared with the nitrate nitrogen, the ammonium nitrogen significantly increased the root / shoot ratio of 8% and the specific gravity of 44% of the ear. The above results showed that nitrate nitrogen significantly promoted the improvement of plant height, leaf area and biomass, and played an important role in plant expansion. Ammoniacal nitrogen significantly promoted the synthesis of chlorophyll and the formation of reproductive organs in millet, and played an important role in the function establishment effect.