摘要
以渝香糯1号为材料,于2015年在四川德阳进行大田试验。设0、120、180 kg/hm^2共3个施氮水平(分别记作N_0、N_(120)、N_(180)),2种不同施氮比例,即底、蘖肥比7∶3(A)和底、蘖、穗肥比5∶2∶3(B),研究施氮量和氮肥运筹模式对糯稻产量和品质的影响。结果表明,与低氮(N_0)相比,高氮(N_(180))和中氮(N_(120))处理渝香糯1号的产量分别增加了31.8%和29.9%,其优势主要表现在有效穗数和每穗粒数上。相同施氮量条件下,采用B种氮肥运筹模式的渝香糯1号产量低于采用A种氮肥运筹模式,N_(120)和N_(180)分别降低了2.9%和2.1%,但差异均无统计学意义。与A种氮肥运筹模式相比,采用B种氮肥运筹模式的总淀粉、支链淀粉含量平均分别提高了9.2%、9.5%。可见,在糯稻生产上适当氮肥后移有利于糯米品质的提高。
In order to understand the effects of nitrogen rates and nitrogen application regimes on grain yield and rice quality of glutinous rice,a field experiment was done in Deyang city,Sichuan Province,China,in 2015.A inbred glutinous rice,Yuxiangnuo 1,was grown in three N treatments (N00 kg N per hectare;N120 120 kg N per hectare;N180 180 kg N per hectare)and two nitrogen application regimes (basal∶early tillering =7∶3,A;basal∶early tillering∶panicle initiation =5∶2∶3,B).The result show that N180 and N120 produced 31.8% and 29.9% higher grain yield than N0 ,respectively.Higher grain yield under treatment N180 and N120 were associated with higher panicles per m2 and spikelets per panicle.Under the same nitrogen application rate,treatment B had lower grain yield than treatment A by 2.9% for N120 and by 2.1% for N180.On average,starch content and amylopectin content under treatment B were 9.2% and 9.5% higher than those under treat-ment A.Our result suggest that adopting nitrogen application regime (basal∶early tillering∶panicle initiation =5∶2∶3) without penalty grain yield but quality improvement of glutinous rice.
出处
《作物研究》
2015年第6期595-598,共4页
Crop Research
基金
四川科技支撑计划项目(2014NZ0128)
四川省农科院中试熟化项目(2011BAD16BO5-1)
西南水稻创新体系建设项目(18090001524)
关键词
糯稻
施氮量
品质
产量
glutinous rice
nitrogen rates
rice quality
grain yield
