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首页> 外文期刊>Australian Journal of Crop Science >Ecophysiological aspects of Tachigali vulgaris seedlings using different sources and doses of nitrogen
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Ecophysiological aspects of Tachigali vulgaris seedlings using different sources and doses of nitrogen

机译：不同来源和氮素用量对普通T草幼苗的生理生态影响

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This study aimed to evaluate the effects of sources and increasing doses of nitrogen on growth and gas exchange in plants ofTachigali vulgaris. The experiment was conducted in a greenhouse in the period from April to July 2015. The experimental designwas randomized blocks in a factorial scheme (4 x 5), corresponding to 4 sources and 5 doses with four replications. The seedlingswere grown in pots containing 3 dm 3 of soil. Nitrogen sources such as urea [(NH?)?CO], ammonium nitrate (NH4NO3), ammoniumsulfate [(NH4) 2SO4] and calcium nitrate [Ca (NO3)2] were tested in five doses of 0, 75, 150, 225 and 300 mg/dm3. They wereapplied as a solution in four portions, 25, 50, 75 and 100 days after transplanting. The lower growth of cultivated plants may beassociated with N-NH 4 + and lower photosynthetic activity, especially due to negative action of this ion on stomatal conductance.The occurrence of this ion resulted in lower growth and biomass production. Based on the results, for the production of tachi-branco seedlings (Tachigali vulgaris) dose of 150 mg dm -3 of N applied in installments, 25, 50, 75 and 100 days, by applyingammonium nitrate is recommended.
机译：这项研究旨在评估氮源和增加剂量的氮对普通T草植物生长和气体交换的影响。该实验在2015年4月至2015年7月的温室中进行。实验设计是以因子分解方案（4 x 5）进行的随机区组，对应于4种来源和5剂，重复四次。幼苗在装有3 dm 3土壤的花盆中生长。以0、75、150、225五种剂量测试了尿素[（NH4）2CO]，硝酸铵（NH4NO3），硫酸铵[（NH4）2SO4]和硝酸钙[Ca（NO3）2]等氮源和300 mg / dm3。它们在移植后的25、50、75和100天分四部分作为溶液施用。耕作植物的较低生长可能与N-NH 4 +和较低的光合作用相关，特别是由于该离子对气孔导度的负作用。该离子的出现导致生长和生物量降低。根据结果​​，建议使用硝酸铵分25、50、75和100天分批施用150 mg dm -3的氮，以生产tachi-branco幼苗（Tachigali vulgaris）。

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