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اسدی کنگرشاهی, علی, اخلاقی امیری, نگین. (1405). روند تغییرات نیتروژن و تأثیر اسیدهای آمینه در گلدهی و تشکیل میوه مرکبات. سامانه مدیریت نشریات علمی, 40(1), 23-43. doi: 10.22092/ijsr.2026.372348.814
علی اسدی کنگرشاهی; نگین اخلاقی امیری. "روند تغییرات نیتروژن و تأثیر اسیدهای آمینه در گلدهی و تشکیل میوه مرکبات". سامانه مدیریت نشریات علمی, 40, 1, 1405, 23-43. doi: 10.22092/ijsr.2026.372348.814
اسدی کنگرشاهی, علی, اخلاقی امیری, نگین. (1405). 'روند تغییرات نیتروژن و تأثیر اسیدهای آمینه در گلدهی و تشکیل میوه مرکبات', سامانه مدیریت نشریات علمی, 40(1), pp. 23-43. doi: 10.22092/ijsr.2026.372348.814
اسدی کنگرشاهی, علی, اخلاقی امیری, نگین. روند تغییرات نیتروژن و تأثیر اسیدهای آمینه در گلدهی و تشکیل میوه مرکبات. سامانه مدیریت نشریات علمی, 1405; 40(1): 23-43. doi: 10.22092/ijsr.2026.372348.814

روند تغییرات نیتروژن و تأثیر اسیدهای آمینه در گلدهی و تشکیل میوه مرکبات

پژوهش های خاک
مقاله 3، دوره 40، شماره 1، خرداد 1405، صفحه 23-43    اصل مقاله (1.13 M)
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22092/ijsr.2026.372348.814
نویسندگان
علی اسدی کنگرشاهی* ؛ نگین اخلاقی امیری
مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی مازندران، سازمان تحقیقات، آموزش و ترویج کشاورزی، مازندران، ایران.
چکیده
به‌منظور بررسی روند تغییرات نیتروژن برگ در طول مرحله گلدهی و تأثیر اسیدهای آمینه در ریزش گل و تشکیل میوه درختان مرکبات، دو آزمایش مجزا انجام شد. در آزمایش اول روند تغییرات غلظت نیتروژن در برگ­های درختان بارده نارنگی انشو و پرتقال تامسون ناول در منطقه شرق مازندران اندازه­گیری شد. در آزمایش دوم تأثیر محلول‌پاشی اسیدهای آمینه (اسید آمینه ترکیبی)، در قالب طرح بلوک­های کامل تصادفی با سه تیمار و سه تکرار به مدت سه سال با درختان نارنگی انشوی میاگاوا انجام شد. تیمارها شامل: .T1 شاهد (محلول‌پاشی با آب)؛ T2. محلول‌پاشی اسید آمینه یک در هزار؛ T3. محلول­پاشی اسید آمینه سه در هزار بود. نتایج آزمایش اول نشان داد که غلظت نیتروژن در برگ­ها از زمان شکسته شدن جوانه­ها و شروع رشد سرشاخه­های بهاری، به تدریج شروع به کاهش کرد و در مرحله باز شدن گل­ها به حداقل رسید. نتایج آزمایش دوم نشان داد که محلول­پاشی اسیدهای آمینه با غلظت یک و سه در هزار در مرحله گلدهی، تأثیر معنی­داری در کاهش ریزش گل و میوه­چه­ها، افزایش تشکیل میوه، غلظت نیتروژن برگ و افزایش عملکرد درختان نارنگی انشو نداشت. بنابراین، بر اساس نتایج این آزمایش با توجه به این‌که زمان گلدهی در درختان مرکبات مصادف با حداقل غلظت نیتروژن در برگ­ها است، نشان‌دهنده محدودیت و نیاز نیتروژن در این مرحله حساس فنولوژی است، اما محلول­پاشی اسیدهای آمینه تأثیر معنی­داری در افزایش غلظت نیتروژن و تشکیل میوه نداشت. لذا مصرف اسیدهای آمینه برای درختان مرکبات در مرحله گلدهی و تشکیل میوه در شرایط اقلیمی شمال کشور به باغ­داران توصیه نمی­شود.
کلیدواژه‌ها
پرتقال تامسون ناول؛ ریزش اندام‌های زایشی؛ نارنگی انشو؛ نیتروژن ذخیره
عنوان مقاله [English]
Trends of nitrogen changes and the effect of amino acids on flowering and fruit set of citrus trees
نویسندگان [English]
ali asadi kangarshahi؛ negin akhlaghi amiri
Mazandaran Agricultural and Natural Resources Research and Education Center,Agricultural Research, Education and Extension Organization (AREEO), Mazandaran, Iran.
چکیده [English]
Background and Objectives: Amino acids are a large group of biological compounds that contain an amino group and a carboxyl group. Amino acids used in foliar nutrition are usually mixtures of different amino acids and short-chain peptides. These amino acids are plant growth stimulants that can be used by foliar spraying and fertigation. Plants may consume amino acids as a source of nitrogen, and in some cases, the amino acid may also be a plant stimulant. On the other hand, the flowering and fruiting period in citrus trees is the most important and critical stage of fruit development in fruit trees. The maintenance of reproductive organs and fruits during this period is directly related to the final yield of the trees. There is a high demand for nitrogen during the flowering and fruiting period. For this purpose, the trend of leaf nitrogen changes during the flowering stage of citrus trees and the effect of amino acids on nitrogen concentration, flower drop, and fruit formation of citrus trees were investigated in two separate experiments.
 

 



Materials and Methods: In the first experiment, trends of nitrogen changes in the leaves of Satsuma mandarin (C. unshiu cv. Miyagawa) trees on Carrizo citrange (Citrus sinensis Osb. × Poncirus trifoliata L. Raf.), rootstock, and on Thomson Navel oranges on Sour Orange (C. aurantium L.) rootstock were measured in the eastern Mazandaran region. In the second experiment, the effect of foliar spraying of amino acids (combined amino acids) was carried out in a randomized complete block design with three treatments and three replications for three years with Satsuma mandarin (C. unshiu cv. Miyagawa) trees on Carrizo citrange (Citrus sinensis Osb. × Poncirus trifoliata L. Raf.), rootstock. The treatments included: T1. Control; T2. amino acid 1 g L-1; T3. amino acid 3 g L-1. The amino acid mixture used contained 8% aspartic acid, 12% glutamic acid, 14% serine, 8% glycine, 2% histidine, 6% arginine, 6% alanine, 6% threonine, 12% proline, 6% valine, 7% leucine, 5% phenylalanine, and about 1% methionine, cysteine, lysine, isoleucine, and tyrosine, and 13% total nitrogen.
 
Results: The results of the first experiment showed that the nitrogen concentration of leaves in Satsuma gradually began to decrease from the time of bud break and the beginning of spring shoot growth, and reached a minimum at the flower opening stage, from 2.65% at the beginning of sampling to 1.84% at full bloom. From full bloom, the amount of nitrogen in the leaves gradually increased again, from 1.84% to 2.66% at the physiological fruit drop (June drop) stage. In the case of Thomson Navel orange trees, the results showed that the nitrogen concentration decreased from 2.57% at the time of sampling to 1.85% at full bloom. After flowering, the nitrogen in the leaves gradually increased and reached from 1.85% to 2.56% at the physiological fruit drop (June drop) stage. The results of the second experiment showed that foliar spraying of amino acids at concentrations of one and three parts per thousand (W/V) showed that foliar spraying treatments had no significant effect on reducing flower and fruit drop, increasing fruit set, leaf nitrogen concentration, and increasing the yield of Satsuma mandarin trees.
 

 



Conclusion: According to the results of this study, the flowering time in citrus trees coincides with the minimum nitrogen concentration in the leaves. This indicates the limitation and need for nitrogen in this sensitive stage of phenology, but foliar spraying of amino acids did not have a significant effect on increasing nitrogen concentration and fruit set. Therefore, foliar application of amino acids for citrus trees during the flowering and fruit set stages in the climatic conditions of the north of the country is not recommended for citrus orchards

 
کلیدواژه‌ها [English]
Dropping of reproductive organs, nitrogen storage, Satsuma mandarin, Thomson navel orange
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