اثر کاربرد گوگرد بر شاخص‏های رشد نهال نارنج و برخی ویژگی‏های یک خاک غیرآهکی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار پژوهشکده مرکبات و میوه‌های نیمه‌گرمسیری، مؤسسه تحقیقات علوم باغبانی، سازمان تحقیقات، آموزش و ترویج کشاورزی، رامسر

2 استادیار پژوهش، پژوهشکده چای، موسسه تحقیقات علوم باغبانی، سازمان تحقیقات، آموزش و ترویج کشاورزی، لاهیجان، ایران

10.22092/ijsr.2023.360511.684

چکیده

این پژوهش با هدف بررسی تاثیر کاربرد گوگرد با و بدون کود گاوی بر شاخص­های رشد نهال جوان نارنج و نیز شاخص‏های کیفی یک خاک غیرآهکی (8/6pH=) اجرا شد. بدین منظور هشت تیمار مختلف شامل کاربرد گوگرد به تنهایی و یا به‌صورت توأم با کود گاوی با هدف تأمین 10، 20 و 30 گرم گوگرد در هر کیلوگرم خاک درنظرگرفته شد. هشت ماه پس از کاشت نهال‏ها، گیاهان برداشت شد و وزن شاخسار و نیز غلظت عناصر غذایی در برگ نهال اندازه‏گیری شد. هم‌چنین در پایان آزمایش، برخی ویژگی‌های زیستی و شیمیایی معرف کیفیت خاک در نمونه خاک‌های پیرامون ریشه نهال نارنج تعیین گردید. بررسی نتایج نشان داد که اثرات ترکیبی گوگرد و کود گاوی بر شاخص‌های رشد نهال نارنج و نیز شاخص‌های کیفیت خاک بیشتر از اثرات هریک از این اصلاح‌کننده های خاک به تنهایی بود. هم‌چنین، کاربرد 10 گرم گوگرد دارای اثرات مثبتی بر وزن شاخساره نارنج و نیز غلظت فسفر، کلسیم، آهن و روی در برگ نارنج بود و این اثرات مثبت در شرایط کاربرد کود گاوی ارتقا بخشیده شد. هم‌چنین با افزایش سطح کاربرد گوگرد، پهاش خاک کاهش یافت و این کاهش در شرایط کاربرد توأم گوگرد و کود گاوی بیشتر بود. هم­چنین نتایج نشان داد که مقدار قابل استفاده فسفر، پتاسیم، کلسیم، سولفات، روی و آهن در خاک متاثر از سطح کاربرد گوگرد بود. علاوه براین، با کاربرد 10 گرم گوگرد مقدار هدایت‏الکتریکی خاک افزایش یافت هرچند افزایش سطح کاربرد گوگرد منجر به افزایش بیشتر این ویژگی نشد. هم‌چنین، بیشترین فعالیت آنزیم فسفاتاز قلیایی و اسیدی در شرایط کاربرد 10 گرم گوگرد به‌صورت توأم با کود گاوی به دست آمد. به‌طورکلی، نتایج این پژوهش نشان داد که کاربرد مقادیر بیشتر از 20 گرم گوگرد بر رشد شاخسار نارنج و نیز فعالیت‌های زیستی اندازه‌گیری شده در خاک مورد مطالعه اثر ممانعت‌کننده ای داشت.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Sulfur Application Effect on Sour Orange Seedling Growth Indices and Some Characteristics of a Non-Calcareous Soil

نویسندگان [English]

  • Tahere Raiesi 1
  • Ehsan Kahne 2
1 Citrus and Subtropical Fruit Research Centre, Horticultural Science Research Institute, Agricultural Research and Education Organization (AREO), Ramsar 46915, Iran
2 Assistant Prof., Tea Research Center, Horticultural Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Lahijan, Iran
چکیده [English]

The present research aimed to study the effects of S application with and without cow manure on growth indices of young sour orange (SO) seedlings and on some chemical and biological properties of a non-calcareous soil (pH= 6.8). In this experiment, eight different treatments, including the application of S at four levels (0, 10, 20, and 30 g-S per kg-soil) with or without cow manure were used. Eight months after planting, seedlings were harvested, and shoot weight and the concentration of nutrients including phosphorus, potassium, calcium, iron, and zinc in the leaves of the seedlings were measured. Additionally, at the end of the experiment, the soils around the SO root were sampled and some biological and chemical properties including the activity of phosphatase enzymes, microbial respiration, pH, electrical conductivity (EC), and the cation exchange capacity were determined. The results showed that the combined application of S and cow manure had a more pronounced effect on the growth indices of SO seedlings and soil quality indices than S and cow manure applied alone. Also, application of 10 g S had positive effects on the shoot’s weight and the concentration of P, Ca, Fe, and Zn in SO leaves and these positive effects were more pronounced in the combined application of S with cow manure. Also, with increasing the level of S application, soil pH decreased, and this decrease was more in the combined application of S and cow manure conditions. Additionally, the available amount of P, K, Ca, sulfate, Zn and Fe in the soil was affected by the level of sulfur application. Application of 10 g of S increased soil EC, although increasing the level of S application did not lead to a further increase in this parameter. The highest activity of alkaline and acidic phosphatase enzymes was obtained in the application of 10 g of S in combination with cow manure. In general, the results of this study showed that application of more than 20 g of S had an inhibitory effect on the growth of SO shoots and biological parameters under study.  

کلیدواژه‌ها [English]

  • Cow manure
  • Biological parameters
  • Soil quality indices
  • Leaf nutrient content
  • Phosphatase enzymes
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