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首页> 外文期刊>American Journal of Plant Nutrition and Fertilization Technology >Effect of Different Forms and Levels of Nitrogen on Vegetative Growth and Leaf Nutrient Status of Nursery Seedling Rootstocks of Peach
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Effect of Different Forms and Levels of Nitrogen on Vegetative Growth and Leaf Nutrient Status of Nursery Seedling Rootstocks of Peach

机译：氮素形态和含量对桃苗期砧木营养生长和叶片营养状况的影响

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摘要

A field experiment was carried out in nursery of Seed and Plant Institute of Karaj (Iran) to determine the effect of various forms and levels of nitrogen application on vegetative growth and leaf nutrient status of two peach seedling rootstocks (Missouri and Yazdi). The study was carried out in two experimental years, 2009 and 2010. Seedlings were planted per plot at the end of January 2009. In addition, Dixiered cultivar as scion was grafted on studied seedlings rootstocks at the end of August 2009,respectively. For each experimental year, soil application of nitrogen fertilizers were added once at the beginning of April and repeated every 14 days. Each treatment was replied 7 times. The results of first experimental year (2009) showed that the application of 600 kg sulfate ammonium ha-1 had highest dry weight of shoot and root production and leaf N concentration of Missouri and Yazdi seedling rootstocks. However, the result of second experimental year (2010) showed that the application of 200 kgsulfate ammonium ha"1 for Missouri and Yazdi rootstocks with Dixiered as peach scion cultivar showed highest shoot length, shoot diameter and leaf surface. Furthermore, The DOP and to SDOP index were estimated for the diagnosis of the leaf mineral status of the trees. According to SDOP index (for 2009+2010), application of 400 kg sulfate ammonium ha-1 for Missouri rootstock with Dixiered as peach scion cultivar showed better balanced nutritional values, the weakest balanced nutritional values belongedto the Yazdi rootstock (with Dixiered as peach scion cultivar) by application of 600 kg urea ha-1.
机译：在Karaj种子和植物研究所的苗圃中进行了田间试验（伊朗），以确定各种形式和水平的施氮量对两种桃苗砧木（密苏里州和亚兹迪州）的营养生长和叶片养分状况的影响。该研究在两个实验年（2009年和2010年）中进行。2009年1月底在每个样地上种植了幼苗。此外，分别在2009年8月底将Dixiered品种接穗嫁接在研究的幼苗砧木上。对于每个实验年，在4月初添加一次土壤氮肥，并每14天重复一次。每种处理重复7次。第一个实验年（2009年）的结果表明，施用600 kg硫酸铵ha-1的密苏里州和Yazdi幼苗砧木的茎和根产生的干重和叶片氮含量最高。然而，第二个实验年（2010年）的结果表明，在密苏里州和Yazdi砧木上配Dixiered桃接穗品种，施用200 kg硫酸铵ha“ 1的枝条长度，枝条直径和叶片表面最高。估计SDOP指数可用于诊断树木的叶子矿物质状况，根据SDOP指数（针对2009 + 2010年），在密苏里州砧木上施用400 kg硫酸铵ha-1和Dixiered作为桃接穗子品种显示出更好的均衡营养价值施用600 kg尿素ha-1后，最弱的均衡营养价值属于Yazdi砧木（以Dixiered为桃接穗栽培品种）。

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