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首页> 外文期刊>Iran Agricultural Research >Maize (Zea Mays L.) Growth and Yield Response to Ethephon Application under Water Stress Conditions
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Maize (Zea Mays L.) Growth and Yield Response to Ethephon Application under Water Stress Conditions

机译：水分胁迫下玉米（Zea Mays L.）对乙烯利的生长和产量响应

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The aim of the present investigation was to study the growth, yield and yield components of maize (Zea mays L.) single cross 704 under different levels of irrigation, plant density, and ethephon in southern Iran where this particular crop has not yetbeen studied in detail. A field experiment was performed in the 2004 5 growing season at the experimental farm of the College of Agriculture, Shiraz University, Shiraz, Iran, located at Badjgah. The experimental design was a randomized complete block with four replicates where the treatments had a split split plot arrangement. Irrigation level (low and high) was the main plot, plant density (53,333 and 80,000 plants/ha) the subplot, and ethephon level (0, 0.56, 0.84 kg/ha a.i., applied at the 6 leaf stage) the sub subplot. The results showed that the rates of foliar application of ethephon could play an important role in maize growth indices, and attribute to grain yield components. Application of ethephon was associated with a decrease in Leaf Area Index (LAI), Leaf Area Index Duration (LAID) and Crop Growth Rate (CGR). Furthermore, ethephon reduced plant and ear height. Increasing the application rates of ethephon showed a significant reduction in early season plant height and LAI, LAID. The controlplants had lower grain yield than those treated with different rates of ethephon. Indeed, this research showed that under conditions of water stress, the maize plant is able to make better use of available water if vegetative growth is partially restricted early in the season. The results also indicated that the yield response of maize to ethephon application would vary with plant density and available water conditions. Ethephon treatment was found to be more beneficial for grain yield with higher plant densities and under water stress conditions.
机译：本研究的目的是研究伊朗南部尚未进行过这种特殊作物研究的不同灌溉，植物密度和乙烯利水平下玉米（Zea mays L.）单交704的生长，产量和产量构成。详情。在2004年5月的生长季节，在设于伊朗巴兹加的设拉子设拉子大学农学院的实验农场进行了田间试验。实验设计是具有四个重复的随机完整块，其中处理具有分割的分割图布置。灌溉水位（低水位和高水位）是子区，次要区是植物密度（53,333和80,000株/公顷），次子区是乙烯利水平（0、0.56、0.84 kg / ha a.i.，在六叶期施肥）。结果表明，乙烯利的叶面施用量可能对玉米生长指数起重要作用，并归因于谷物的产量构成因素。乙烯利的施用与叶面积指数（LAI），叶面积指数持续时间（LAID）和作物生长速率（CGR）的降低有关。此外，乙烯利降低了植物和耳朵的高度。乙烯利的施用量增加表明早期植株高度和LAI，LAID显着降低。对照植物的谷粒产量低于用不同乙烯利比率处理的植物。确实，这项研究表明，在缺水的条件下，如果在季节初部分限制了营养生长，则玉米植物能够更好地利用可用水。结果还表明，玉米对乙烯利施用的产量响应将随植物密度和可用水分条件而变化。发现乙烯利处理对较高的植物密度和水分胁迫条件下的谷物产量更有利。

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