Bahmaniar M A, Ranjbar G A
Agricultural Campus of Sari, Km 9 Darya Boulevard, Sari, Iran.
Pak J Biol Sci. 2007 Jun 1;10(11):1829-34. doi: 10.3923/pjbs.2007.1829.1834.
In order to consider effects of various levels of nitrogen and potassium application on kernel processing characteristics of rice cultivars, an experiment was developed in 2004 and 2005 using Tarrom (a local Iranian landrace) and Neda (an Iranian improved cultivar). In this experiment 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 using a split factorial design with 3 replications. Nitrogen fertilizer have been applied in three stages (1/3 in transplanting stage, 1/3 in tillering stage and finally 1/3 in flowering initiation stage) and potassium fertilizer have been applied in two stages (1/2 in transplanting stage and 1/2 in shooting stage). Results showed that application of nitrogen cause an increase in amount of bran production and have shown significant effects on percentages of bran, head and brewers rice, husking efficiency and transformation degree. However, potassium application has increased percent of bran and husking efficiency and has decrease percentages of brewers rice and has not demonstrated significant effects on percentages of husk, head rice and transformation degree. Furthermore, simultaneous application of nitrogen and potassium in Tarrom genotype has not shown significantly effects on percentages of husk, head and brewers rice and transformation degree. In Neda, cultivar has not also shown significant effects on percentages of bran production, head and brewers rice and husking efficiency, respectively. In Tarrom genotype amount of husk, bran, brewers rice and transformation degree were higher than in Neda cultivar, however, amount of head rice and husking efficiency in Neda cultivar were higher than in Tarrom genotype.
为了研究不同施氮量和施钾量对水稻品种籽粒加工特性的影响，于2004年和2005年开展了一项试验，选用了Tarrom（伊朗当地一个地方品种）和Neda（伊朗一个改良品种）。本试验采用裂区设计，设置了4个氮肥水平（分别为来自尿素的0、50、100和150 kg N·ha⁻¹）和4个钾肥水平（分别为来自硫酸钾的0、75、150和225 kg K₂O·ha⁻¹），重复3次。氮肥分三个阶段施用（移栽期施1/3，分蘖期施1/3，始穗期施1/3），钾肥分两个阶段施用（移栽期施1/2，拔节期施1/2）。结果表明，施氮会使米糠产量增加，对米糠、整精米、碎米的百分比、脱壳率和转化率均有显著影响。然而，施钾增加了米糠百分比和脱壳率，降低了碎米百分比，对稻壳、整精米和转化率百分比没有显著影响。此外，在Tarrom基因型中同时施用氮和钾对稻壳、整精米、碎米百分比和转化率没有显著影响。在Neda品种中，对米糠产量、整精米和碎米百分比以及脱壳率也没有显著影响。在Tarrom基因型中，稻壳、米糠、碎米产量和转化率高于Neda品种，然而，Neda品种的整精米产量和脱壳率高于Tarrom基因型。
