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首页> 外文期刊>Environment and Ecology >Effect of different NPK combinations on fruit yield, quality and leaf nutrient composition of apple (Malus domestica Borkh) cv. Red Delicious at different altitudes.
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Effect of different NPK combinations on fruit yield, quality and leaf nutrient composition of apple (Malus domestica Borkh) cv. Red Delicious at different altitudes.

机译：不同氮磷钾肥组合对苹果（Malus domestica Borkh）cv果实产量，品质和叶片营养成分的影响。红色美味在不同的高度。

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摘要

The effects of various NPK combinations on the yield, quality and leaf nutrient status of apple cv. Red Delicious grown at 3 altitudes (low, middle and high altitudes of 1400, 1600 and 1800 m above sea level, respectively) in Jammu and Kashmir valley in India were studied during 2002-03. Fruit maturity was earliest with 300 g N + 150 g P + + 450 g K per tree at all altitudes. The lower altitude resulted in earlier fruit maturity than the middle and high altitudes. Treatment with 600 g N + 300 g P + 900 g K per tree gave the highest fruit yield per tree. Among the altitudes, the middle altitude recorded the highest fruit yield. The application of 300 g N + 150 g P + 900 g K per tree and 300 g N + 300 g P + 900 g K per tree resulted in superior fruit colour. The high altitude was superior in terms of fruit colour and firmness. High fruit volume was recorded for the middle altitude in combination with 600 kg N + 150 g P + 900 g K per tree. Leaf nutrient (N, P and K) accumulation was greatest when N, P and K were applied at the higher rates. The high altitude recorded the greatest leaf nutrient status..
机译：各种氮磷钾肥组合对苹果简历产量，品质和叶片营养状况的影响。 2002-03年间，研究了印度查Jam和克什米尔谷地3个海拔高度（分别为海拔1400、1600和1800 m的低海拔，中海拔和高海拔）上生长的Red Delicious。在所有海拔高度，每棵树的果实成熟度最高，为300 g N + 150 g P + + 450 gK。较低的海拔比中等海拔和较高海拔导致更早的果实成熟。每棵树用600 g N + 300 g P + 900 g K处理后，每棵树的果实产量最高。在海拔高度中，中等海拔高度记录了最高的水果产量。每棵树施用300 g N + 150 g P + 900 g K和每棵树300 g N + 300 g P + 900 g K可获得优异的果色。高海拔地区在果实颜色和硬度方面都比较出色。在中等海拔地区，每棵树结合600 kg N + 150 g P + 900 g K记录到高果量。当以较高的比例施用氮，磷和钾时，叶片养分（氮，磷和钾）的积累最大。高原记录了最大的叶片营养状况。

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