【摘要】 为筛选出适宜耐抽薹贵迟杂2号大白菜品种的播种期和基肥，采用不同播期和基肥栽培，研究其在镇远县生长和生理等指标。结果表明，4月11日或4月23日移栽到大田，对贵迟杂2号大白菜的产量影响较小。以硝磷酸铵复合肥作基肥，贵迟杂2号大白菜生育期短；以腐熟牛粪作基肥，生长发育速度稍慢；以腐熟牛粪2 000 kg/667 m²+硝磷酸铵复合肥50 kg/667 m²作基肥,大白菜硝酸还原酶活性和根系活力均得到明显提高，结球初期净光合速率也较高。基肥中复合肥越多，大白菜蒸腾速率越低，而牛粪量越多，细胞间隙CO₂浓度越高。因此，移栽期对贵迟杂2号大白菜在镇远县栽培的产量基本没有影响，而腐熟牛粪和硝磷酸铵复合肥作基肥,农艺性状综合表现较好，可作为镇远县春夏栽培贵迟杂2号大白菜的配套技术措施推广应用。更多还原

【Abstract】 To identify suitable sowing dates and base fertilizers for the bolting-resistant Chinese cabbage cultivar Guichiza No.2,field experiments with different transplanting dates and fertilization regimes were conducted in Zhenyuan County,growth and physiological indices were evaluated.The results showed that transplanting on April 11 or April 23 had minimal effects on yield.When ammonium nitro-phosphate compound fertilizer was applied as base fertilizer,the growth period of Guichiza No.2 was shorter.In contrast,mature cattle manure slightly delayed growth.The combined application of 2 000kg/667 m² cattle manure+50 kg/667 m² ammonium nitro-phosphate compound fertilizer significantly improved nitrate reductase activity,root activity,and net photosynthetic rate at the early heading stage.Higher proportions of compound fertilizer in base fertilizers reduced transpiration rate,while increased cattle manure raised inter cellular CO₂ concentration.In conclusion,transplanting dates had negligible impacts on yield,whereas the combined use of mature cattle manure and ammonium nitro-phosphate compound fertilizer optimized agronomic performance.This practice is recommended as a key cultivation technique for Guichiza No.2 in Zhenyuan County during spring-summer seasons.更多还原