【摘要】 目的:为探寻直播饲用油菜最佳苔肥施用量,为加速开发油菜饲用价值提供技术参考。方法:以双低油菜秦优66为试验材料,采用单因素随机区组设计,研究5种不同施氮量(尿素,120、180、240、300、360 kg/hm~2)对油菜秦优66生长和饲草产量的影响。结果:结果表明,随着施氮量的增加,秦优66的株高、单株角果重、单株有效角果数、秸秆干重、菜籽产量、单株重也显著增加,但是对于单株叶数、单株叶重、千粒重等影响未达到显著水平。结论:当施氮量为300 kg/hm~2,秦优66饲草产量最高。更多还原

【Abstract】 Objective:The effects of different nitrogen application rates on growth and forage yield of Qinyou 66 were studied to determine the optimal nitrogen application rate. Methods: Single factor randomized block design was adopted in this experiment. Five nitrogen application amounts(120, 180, 240, 300, 360 kg/hm~2 urea) were set up to determine the effects of different nitrogen application amounts on the growth of rapeseed and forage yield. Results: The results showed that different nitrogen application rates had significant effects on plant height, pod weight per plant, effective pod number per plant, dry weight of straw, rapeseed yield and single plant weight, but no significant effects on leaf number per plant, leaf weight per plant and thousand-grain weight. Conclusion: To sum up, when the nitrogen application amount is 300.00 kg/hm~2, rape Qinyou 66 has the best development.更多还原