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首页> 外文期刊>Journal of Natural Sciences Research >Macro- and Micronutrient Uptake in Rice + Cowpea Production System as Influenced by Mineral Nitrogen and Crop Population
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Macro- and Micronutrient Uptake in Rice + Cowpea Production System as Influenced by Mineral Nitrogen and Crop Population

机译：矿质氮和作物种群对水稻+ Cow豆生产系统中微量元素和微量元素吸收的影响

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摘要

The study was aimed at evaluating macro- and micronutrient uptake of rice and cowpea when grown in sole and mixture populations under varying levels of density (5x 104, 10x 104 and 20 x104plants/ha) and nitrogen (0,15,30 and 45kgN/ha), using urea as nutrient source. Results obtained showed that uptake of nitrogen increased with increasing rates of nitrogen fertilizer in both crops used for the study. In both sole and mixture populations, 45kgN/ha (50000plants/ha) and 30kgN/ha (200000plants/ha) recorded the lowest nitrogen uptake value of 0.12 and 0.14mg/plant respectively. Mean P uptake in the second in the cropping was reduced by 35.3% over the first cropping. Medium density of 100000plants/ha gave the highest K value of 0.45mg/ha during the first cropping. Uptake of potassium, phosphorus, sodium, calcium and magnesium and microelements were generally higher in cowpea than rice. Values of zinc uptake in shoots of both rice and cowpea were very low ranging from 0.00002 to 0.000075mg/plant in rice and 0.00011 and 0.0017mg/plant in cowpea. Increasing plant population density generally depressed uptake of both macro- and microelements in both rice and cowpea. Results from this study indicate that the high plant densities reduce nutrient uptake of crops, hence farmers should select optimum densities that will maximize crop nutrition and consequently yield. Keywords: nutrient uptake, cowpea, rice, nitrogen fertilizer, plant population
机译：该研究旨在评估在密度和密度（5x 104、10x 104和20 x104植物/公顷）和氮（0、15、30和45kgN / ha），使用尿素作为营养来源。获得的结果表明，用于该研究的两种农作物中氮的吸收均随氮肥施用量的增加而增加。在单独和混合种群中，分别记录的最低氮吸收值为0.12和0.14mg / ha，分别为45kgN / ha（50000株/公顷）和30kgN / ha（200000株/公顷）。与第二季相比，第二季的平均P吸收量降低了35.3％。在第一次种植期间，中等密度的100000株植物/公顷的最高K值为0.45mg / ha。 cow豆中的钾，磷，钠，钙和镁以及微量元素的摄入量通常比水稻高。水稻和cow豆的芽中锌的吸收值非常低，在水稻中为0.00002至0.000075mg /株，在cow豆中为0.00011至0.0017mg /株。植物种群密度的增加通常会抑制水稻和cow豆中常量元素和微量元素的摄入。这项研究的结果表明，高植物密度会降低农作物对养分的吸收，因此，农民应选择最佳密度，以最大程度地增加作物营养，从而提高产量。关键词：养分吸收，cow豆，水稻，氮肥，植物种群

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