摘要
以迟熟中粳品种“通育粳1号”为材料,研究了施氮量对大棚保护地茬水稻产量、品质及效益的影响。结果表明,大田施氮量(纯N)为150 kg/hm2的产量最高,比不施氮增加26.60%;施氮量在75150 kg/hm2范围内, 稻谷具有较好的加工品质;施用氮肥能减少稻米垩白粒率,降低直链淀粉含量,提高蛋白质含量;以不施氮为对照,施氮量在150 kg/hm2时,新增纯收益最大(为13.91%),而施氮量在75 kg/hm2时,则可取得最高的边际成本报酬率及氮肥农学利用率。
Late ripen mid-season rice “Tong Yu Jing 1” was used as material to study the influence of nitrogen application amount on yield, quality and effect of rice under shed protection field. The results showed that the yield was highest with the nitrogen level of 150 kg/hm^2. Compared with no nitrogen application, the yield increased 26.60 % ; With nitrogen application amount between 75150 kg/hm^2; grain had better milling quality; using nitrogen could reduce grain chalky percentage, amylose content, and enhance protein content. Net profit with nitrogen level of 150 kg/hm^2 was largest （13.91% ）, while margin cost reward rates and nitrogen agronomic efficiency with nitrogen level of 75 kg/hm^2 was highest.
出处
《金陵科技学院学报》
2005年第3期61-65,共5页
Journal of Jinling Institute of Technology
基金
江苏省"十五"重点科技资助项目(BE2001329)江苏省农业科学院院基金项目(6210339)资助
关键词
保护地
施氮量
产量
稻米品质
效益.
protection field
nitrogen application amount
yield
rice quality
effect
