5种新型肥料土壤养分供给特征对夏玉米光合特性及产量的影响

为探究不同类型肥料对土壤养分含量、夏玉米光合特性及产量的影响，选择6种不同类型复合(混)肥料，以安农876为供试品种，采用大田试验，设不施肥(T1)、常规施肥(T2)、缓释掺混复合肥(T3)、增效控释肥+黄腐酸钾(T4)、增效玉米控释肥+腐殖酸(T5)、稳定性复合肥(T6)和腐殖酸类复合肥(T7)7个处理，研究了皖北地区6种肥料对夏玉米光合特性和产量形成的影响。结果表明：夏玉米季，5种新型肥料处理的土壤碱解氮、有效磷含量与常规复合肥相比(T2)在玉米需肥关键期(吐丝期)差值最大，土壤速效钾在拔节期到吐丝期均比常规复合肥(T2)高，更符合夏玉米生长发育需求，其中以T5处理最高；5种新型肥料对夏玉米的净光合速率、气孔导度、蒸腾速率，胞间CO₂浓度均有不同程度的改善；玉米产量与净光合速率、气孔导度、蒸腾速率、胞间CO₂浓度、SPAD值呈显著或极显著相关；5种新型肥料的夏玉米产量比常规肥料高3.6%～21.88%，均达到显著差异水平，以T5产量最高，为11 867.18 kg·hm^-2，显著高于其他处理。皖北砂姜黑土区玉米季，5...

Effects of nutrient release patterns of five new fertilizers on photosynthetic characteristics and yield formation of summer maize

In order to explore the effects of different types of fertilizers on soil nutrient content, photosynthetic characteristics and yield of summer corn, six different types of compound (mixed) fertilizers were selected, taken Annong 876 as the test variety, a field test was conducted with 7 treatments: no fertilization (T1), conventional fertilization (T2), slow-release blended compound fertilizer (T3), synergistic controlled-release fertilizer + potassum fulvic acid (T4), enhanced corn controlled-release fertilizer + humic acid (T5), stable compound fertilizer (T6) and humic acid compound fertilizer (T7). The results showed that compared with the application of conventional compound fertilizer (T2), the soil alkaline hydrolyzable nitrogen and available phosphorus contents with the application of five new fertilizers had the largest differences in the critical period of corn fertilizer demand in the summer corn season, and the soil available potassium was higher than that of conventional compound fertilizer (T2) form the jointing stage to the spinning stage, which was more in line with the growth and development need of the summer corn, and it was the highest in T5 treatment. The five new fertilizers improved the net photosynthetic rate, stomatal conductance, transpiration rate and intercellular CO₂ concentration of the summer corn to varying degrees. The corn yield was significantly or extremely correlated with the net photosynthetic rate, stomatal conductance, transpiration rate, intercellular CO₂ concentration, and SPAD value. The yield of the summer corn with application of the five new fertilizers was 3.60% - 21.88% higher than that with the conventional fertilizers, all of which reached a significant difference level; the yield with T5 treatment was the highest, of 11 867.18 kg·hm^-2, which was significantly higher than that with