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首页> 外文期刊>Pure and Applied Biology >Interactive Effects of Nitrogen and Sulfur on Growth, Dry Matter Partitioning and Yield of Maize
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Interactive Effects of Nitrogen and Sulfur on Growth, Dry Matter Partitioning and Yield of Maize

机译：氮与硫交互作用对玉米生长，干物质分配和产量的影响

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Nitrogen (N) and sulfur (S) are important crop nutrients limiting the crop growth and yield. In order to study N and S effect on growth, dry mater partitioning and grain yield of maize, a field experiment was conducted at the New Developmental Research Farm of Khyber Pakhtunkhwa (KPK), The University of Agriculture, Peshawar during summer 2011, which was designed in randomized complete block design (RCBD) replicated thrice. Growth, dry matter partitioning, yield & yield components, and harvest index responded positively to N and S fertilization, but the magnitude of response varied with level of N and S application. Days to tasseling, silking and physiological maturity delayed, plant height and mean single leaf area increased with increase in N and S levels. Similarly, dry matter partitioning in stem, leaf, ear, and grains was increased with an increase in N and S levels and decreased in the control plots. The heaviest thousand grains weight was obtained when both N and S were applied at the highest rates. The highest grain yield viz., 3122 kg ha-1 was obtained in the plots where N was applied @ 160 kg ha-1, while minimum grain yield i.e. 2039 kg ha-1 was obtained in control plots. Grain yield increased to maximum (2882 kg ha-1) when S was applied @ 40 kg ha-1, and the lowest grain yield (2458 kg ha-1) was recorded in control plots. The harvest index ranked first when both N (27.8%) and S (27.7%) were applied at the highest rates of 160 kg N and 40 kg S ha-1. Harvest index showed positive relationship with the increase in grain yield and yield components in maize. The results indicated that all the three levels of N and two levels of S increased the yield components and grain yields as well as harvest index in maize, and increased with an increase in N and S levels when compared with the control (N and S not). It is therefore, suggested that application of the highest S @ 40 kg S ha-1 and N levels @ 160 kg N ha-1 could increase maize productivity in the study area.
机译：氮和硫是限制作物生长和产量的重要农作物营养素。为了研究氮和硫对玉米生长，干物质分配和谷物产量的影响，于2011年夏季在白沙瓦农业大学的开伯尔·普赫图赫瓦（KPK）新发展研究农场（KPK）进行了田间试验。设计在随机完整块设计（RCBD）中重复三次。生长，干物质分配，产量和产量构成以及收获指数对氮和硫的施肥呈正响应，但响应的幅度随氮和硫的施用水平而变化。抽穗，蚕丝和生理成熟的时间延迟，株高和平均单叶面积随氮和硫水平的增加而增加。同样，干物质在茎，叶，穗和谷物中的分配随着氮和硫水平的增加而增加，而在对照地块中则有所减少。当以最高的比例施用氮和硫时，可获得最重的千粒重。在以160 kg ha-1施用氮的地块中，最高谷物产量为3122 kg ha-1，而在对照地块中则获得了最小的谷物产量，即2039 kg ha-1。当以40 kg ha-1施用S时，谷物产量增至最大（2882 kg ha-1），而在对照样地中记录的最低谷物产量（2458 kg ha-1）。当以160 kg N和40 kg S ha-1的最高比例施用N（27.8％）和S（27.7％）时，收获指数排名第一。收获指数与玉米籽粒产量和产量构成要素的增加呈正相关。结果表明，与对照相比，三个水平的氮水平和两个水平的硫水平均增加了玉米的产量构成和籽粒产量以及收获指数，并随着氮和硫水平的增加而增加（氮和硫不高于对照）。 ）。因此，建议最高施S @ 40 kg S ha-1和施氮N @ 160 kg N ha-1可以增加研究区域的玉米产量。

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