Effects of N and K applications on agronomic characteristics of two Iranian and landrace rice (Oryza sativa L.) cultivars.
Effects of N and K applications on agronomic characteristics of two Iranian and landrace rice (Oryza sativa L.) cultivars.
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氮肥和钾肥施用对两个伊朗稻和地方品种稻 (Oryza sativa L.) 品种农艺性状的影响。
DOI：
10.3923/pjbs.2007.880.886
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
S. Ahmadian
中科院分区：
文献类型：
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作者：
M. Bahmaniar;G. Ranjbar;S. Ahmadian
氮、钾等营养元素制约着水稻品种的产量表现，影响着品种的性状。为了研究不同氮钾用量对两个水稻品种（Tarrom和Neda，分别为伊朗地方品种和改良品种）产量和化学成分的影响，本试验于2004年和2005年进行。采用裂因随机区组试验设计，研究了氮肥（尿素源0、50、100和150 kg N ha ~（-1））和钾肥（硫酸钾源0、75、150和225 kg K_2O ha ~（-1））对水稻产量的影响。在植物生长的三个不同阶段（移栽期1/3、分蘖期1/3和开花初期1/3）施用氮肥，并且在两个生长阶段（移栽期1/2和抽薹期1/2）施用钾肥。结果表明，施氮提高了水稻株高、分蘖数、剑叶长、剑叶宽、穗长、穗粒数、产量、干物质积累、生物产量、收获指数、叶钾、叶氮、千粒重和空粒率。除收获指数和千粒产量外，施钾对上述产量构成因素均有积极影响。Neda品种在多数性状上优于Tarrom基因型。氮钾互作对Neda品种的单株分蘖数、籽粒产量、干物质积累量和生物产量有显著影响，对Tarrom基因型的旗叶长、每穗粒数、籽粒产量、干物质积累量、生物产量、收获指数和千粒重有显著影响。
Nutrition elements like nitrogen and potassium are restricting yield performance of rice cultivars and affecting on their characteristics. In order to consider effects of different amount of nitrogen and potassium on yield and chemical compounds of two rice cultivars (Tarrom and Neda which are landrace and improved Iranian genotypes, respectively), current experiment has been undertaken in 2004 and 2005. Four levels of nitrogen fertilizer (0, 50, 100 and 150 kg N ha(-1) from urea source) and four levels of potassium fertilizer (0, 75, 150 and 225 kg K2O ha(-1) from potassium sulfate source) have been applied in a split-factorial based on randomized block design with three replications. Nitrogen fertilizer has been applied in three different stages of plant growth (1/3 in transplanting, 1/3 in tillering and 1/3 in flowering initial stages) and potassium fertilizer has also been applied in two growth stages (1/2 in transplanting and 1/2 in shooting stages). Results indicated that application of nitrogen has increased plant height, number of tiller, length and width of flag leaf, length of panicle, number of grain per panicle, grain yield, amount of dry matter, biological yield, harvest index, leaf potassium, leaf nitrogen, 1000 grain weight and reducing percentage of hallow grain. Also, applied potassium has positive effects on all of above mentioned yield components except harvest index and 1000 grain yield. Neda cultivar was better than Tarrom genotype for most of the measured traits. Interaction of nitrogen and potassium were affected significantly on number of tiller per plant, grain yield, amount of dry matter and biological yield in Neda cultivar and on length of flag leaf, number of grain per panicle, grain yield, amount of dry matter, biological yield, harvest index and 1000 grain yield in Tarrom genotype.