摘要
以超级杂交稻H优518为材料,研究了不同追肥时期和施肥量对机插双季晚稻产量和经济效益的影响。结果表明:移栽后6 d开始追肥处理的有效穗数最多,平均382.5万穗/hm2;移栽后8 d开始追肥处理的穗总粒数最多,平均为109.4粒,分别比移栽后4 d和6 d开始追肥处理增加0.9和0.6粒;各处理间结实率无明显差异;移栽后6 d开始追肥处理的平均产量最高,分别比移栽后4 d和8 d开始追肥处理增产3.9%和4.3%。经济效益的大小顺序为移栽后6 d开始追肥>移栽后4 d开始追肥>移栽后8 d开始追肥。在本试验条件下,洞庭湖平原区双季机插晚稻适宜的追肥时间以栽插后6 d左右为佳,施用量宜少,以单质氮肥和钾肥为主;进入分蘖始盛期后肥料宜重施,以速效氮肥和复合肥为主。
The effects of different time and application amount of fertilizer on the yield and economic benefits of machine transplanting late rice by using H you 518 as material were studied in the present paper.The results showed that the num-ber of effective tillers were highest with 382.5 ten thousand per ha under the treatment of application fertilizer 6 days after transplanting.And the grain numbers per spike were highest with 109.4 kernel under the treatment of application fertilizer 8 days after transplanting,which increased by 0.9 and 0.6 kernel per spike compared with the treatments of application fertilizer 4 days and 6 days after transplanting.There were no significant differences in the seed setting rate among treat-ments.The yield of the treatment of application fertilizer 6 days after transplanting was increased by 3.9% and 4.3% than that of the treatments 4 days and 8 days after transplanting respectively.And the economic benefits of these three treatments showed the tendency of treatment 6 days after transplanting ＆gt;treatment 4 days after transplanting ＆gt;treatment 8 days after transplanting.The results indicated that the best date of application fertilizer was 6 days after transplanting,and the appli-cation amount of fertilizer were lightly,elemental nitrogen and potassium fertilizer.After the tillering stage,the application amount of fertilizer was increased,and the kinds of fertilizer were available nitrogen and compound fertilizer.
出处
《作物研究》
2014年第6期589-592,共4页
Crop Research
基金
国家粮油棉高产创建项目(2013)
关键词
晚稻
机插
施肥
产量
经济效益
Late rice
Machine transplanting
Fertilization
Yield
Economic benefits
Late rice
Machine transplanting
Fertilization
Yield
Economic benefits
