密度与氮肥互作对烤烟氮钾含量、光合特性及产量的影响  

Effects of interaction between nitrogen application rate and planting density on nitrogen and potassium contents, photosynthesis characteristics and yield of flue-cured tobacco

作　　者：张喜峰[1] 张立新[1] 高梅[1] 李云飞[2] 翟优雅[1] 韦成才 马英明 陈明山 黄金辉 

机构地区：[1]西北农林科技大学生命科学学院,陕西杨凌712100 [2]西北农林科技大学林学院,陕西杨凌712100 [3]陕西省烟草研究所,陕西西安710000 [4]陕西省烟草公司商洛市公司,陕西商洛726000

出　　处：《中国土壤与肥料》2013年第2期32-36,61,共6页Soil and Fertilizer Sciences in China

基　　金：陕西省特色烟叶开发重大专项(ZDZX2011-001)

摘　　要：以秦烟96为材料,采用大田裂区试验设计,种植密度(D)为主区,氮素(N)为副区,分别设3个水平,研究氮用量、密度互作对烤烟圆顶期氮钾含量、光合特性及产量的影响,寻求适合烤烟生长的最佳施氮量和种植密度组合。初步研究结果表明,密度、氮用量及其互作均对烤烟圆顶期氮、钾含量和光合作用及产量影响显著,氮、钾、碳水化合物含量和净光合速率(Pn)均与产量呈显著正相关。产量和氮含量在3个密度下均以高氮量处理最高,而钾含量、Pn和碳水化合物含量均以中氮量处理最高。产量和钾含量在3个氮量下以中密度处理最高,而氮含量以低密度处理最高,Pn和碳水化合物含量以低、中密度处理最高。本试验条件下,秦烟96的最佳氮用量与密度组合为中密度高氮量(D2N3),适宜的氮肥用量和密度范围分别为88.10～103.19 kg/hm2、16 078～16 698株/hm2。A field experiment was conducted using split-plot experiment design i. e. three regimes of planting density （D） as main plots and nitrogen （N） rate as sub-plots to investigate the effects of interaction between N application rate and planting density on N and potassium （K） contents, photosynthesis characteristics at round top stage and yield of flue-cured tobacco to determine the optimum N application rate and planting density for better growth, higher yield and quality of flue-cured to- bacco. The preliminary results showed that planting density, N rate and the interaction between them had significant effects on the contents of N, K and carbohydrate contents, net photosynthesis rate （Pn） and yield. Significant positive correlations were obtained between N and K contents, Pn, carbohydrate content of flue-cured tobacco at round top stage and yield. Under all three-density conditions, the highest yield and N content presented at high N rate treatment, while the greatest contents of K, Pn and carbohydrate at medium N rate treatment. Under all three N rates conditions, the highest yield and K content presented at medium density, while the greatest N content at low density, and the highest Pn and carbohydrate content at low and medium density. In this study, the best combination of N and density treatment was medium density plus high N rate （D2N3）, and the appropriate density and N range were 16 078 - 16 698 plant/hm2 and 88. 10 ～ 103.19 kg/hm2 respectively for Qinyan 96.

关 键 词：烤烟 密度和施氮量 氮 钾含量 光合作用 产量 

分 类 号：S572[农业科学—烟草工业]