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为了研究硝基复合肥中硝态氮所占比例对玉米苗期生长及光合特性的影响,通过温室盆栽试验,以玉米植株性状、叶片光合色素含量及光合特性为评价参数,对硝态氮含量不同的硝基复合肥进行肥效评价。结果表明,随着硝基复合肥中硝态氮所占比例的增加,玉米的株高、茎粗、叶面积、叶片光合色素含量、光合速率、地上部和地下部干物质量均有不同程度的提高。硝基复合肥中硝态氮的含量为4%时,其玉米植株农艺性状、光合色素含量、光合强度及干物质量均显著高于硝态氮含量为2%的硝基复合肥,且与硝态氮含量为6%的硝基复合肥相比上述指标无显著差异。综合考虑,硝基复合肥中硝态氮的含量为4%即可较好的满足玉米生长发育需要。
In order to study the effect of the proportion of nitrate nitrogen on the growth and photosynthetic characteristics of maize seedlings, the greenhouse plants were used to evaluate the plant characters, photosynthetic pigment content and photosynthetic characteristics of maize. Nitrate nitrogen Fertilizer efficiency evaluation of different nitro compound fertilizer. The results showed that the plant height, stem diameter, leaf area, leaf photosynthetic pigment content, photosynthetic rate, dry matter mass of aerial part and underground part of maize increased with the increasing proportion of nitrate nitrogen in the compound fertilizer improve. The nitrate content of nitro compound fertilizer was 4%, its agronomic characters, photosynthetic pigment content, photosynthetic capacity and dry matter content of maize plants were significantly higher than that of nitrate compound fertilizer with nitrate content of 2% Nitrogen content of 6% of nitro compound fertilizer compared to the above indicators no significant difference. Taken together, the nitro-compound fertilizer nitrate content of 4% can better meet the growth and development needs of corn.