اثر توده‌های درختی دست‌کاشت بر خواص فیزیکی، شیمیایی و زی‌توده میکروبی خاک ‏(بررسی موردی: زاغمرزِ ‏نکا)‏

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی دکترا، گروه جنگلداری، دانشکده منابع طبیعی نور، دانشگاه تربیت مدرس، نور، ایران، ایران

2 استاد، گروه جنگلداری، دانشکده منابع‌طبیعی نور، دانشگاه تربیت مدرس، نور‏، ایران‏

3 استادیار، گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج، ایران.

4 دانشیار، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مازندران، سازمان تحقیقات، آموزش و ترویج ‏کشاورزی، ساری، ایران‏

چکیده

در این پژوهش، خواص فیزیکی، شیمیایی و شاخص­های میکروبی خاک توده­های دست­کاشت 21 ساله خالص توسکا ییلاقی، صنوبر دلتوئیدس، سرو زربین و نیز آمیخته توسکا ییلاقی-سفیدپلت در زاغمرز نکا بررسی شد. در هر توده، 10 قطعه ­400 متر مربعی انتخاب شد و در داخل هر یک، پنج نمونه خاک در عمق صفر تا 10 سانتی­متری تهیه شد. بیشترین مقادیر محتوی رطوبت خاک، واکنش خاک، نیتروژن کل، فسفر، پتاسیم و منیزیم دردسترس، تنفس میکروبی پایه، زی­توده میکروبی نیتروژن خاک در توده­های توسکا-سفیدپلت، و توسکا ییلاقی و بیشترین مقادیر کربن آلی، نسبت کربن به نیتروژن کل، زی­توده میکروبی کربن و نسبت زی­توده میکروبی کربن به نیتروژن خاک در توده­ زربین مشاهده شد. توده زربین همبستگی مثبت با مقادیر کربن آلی، نسبت کربن به نیتروژن، سیلت، رس، زی­توده میکروبی کربن و نسبت زی­توده میکروبی کربن به نیتروژن خاک داشت. اما­ توده­های خالص و آمیخته توسکا بالاترین همبستگی را با مقادیر نیتروژن کل، پتاسیم، کلسیم، منیزیم و فسفر دردسترس، محتوی رطوبت خاک، تنفس میکروبی پایه و زی­توده میکروبی نیتروژن داشتند که مبین حاصلخیزی خاک این توده­هاست و می­تواند ترغیب کاربران را برای احیای اراضی بایر و رهاشده در قالب جنگلکاری و یا کشت تلفیقی فراهم کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of artificial tree stands on physical, chemical properties and soil microbial ‎biomass (case ‎study: Zaghmarz of Neka)‎

نویسندگان [English]

  • Javad Jafari 1
  • Masoud Tabari 2
  • Vahid Hosseini 3
  • Seyed Ehsan Sadati 4
1 Ph.D. Student of Forestry, Faculty of Natural Resources, Tarbiat Modares University, Noor, I. R. Iran‎
2 Professor, Department of Forestry, Faculty of Natural Resources, Tarbiat Modares University, Noor, I. ‎R. ‎Iran‎
3 Assistant Prof., Department of Forestry, Faculty of Natural Resources, Kurdistan University, ‎Sanandaj, I. R. ‎Iran‎
4 Associate Prof., Research Division of Natural Resources, Mazandaran Agricultural and Natural Resources ‎Research and Education Center, AREEO, Sari, Iran
چکیده [English]

In the present study, physical, chemical, and biological soil properties in pure plantation stands (21 years old) of Alnus subcordata, Populus deltoides, Cupressus sempervirens, and a mixed stand of Alnus subcordata-Populus caspica at Zaghmarz area, Neka city (north of Iran), were studied. In each stand, 10 plots of 400 m2 were selected and in each plot five samples were taken from 10 cm-depth of soil. The highest values of soil water content, pH, total nitrogen (N), phosphorus (P), potassium (K) and magnesium available (Mg), basal microbial respiration (BMR), soil microbial biomass nitrogen (MBN) allocated to stands of A. subcordata–P. caspica and A. subcordata, while the highest amounts of organic carbon (C), C:N ratio, microbial biomass carbon (MBC), and MBC/MBN ratio was observed in Cupressus stand. Analysis of PCA showed that Cupressus plantation has a positive correlation with the amount of C, CN, silt, clay, MBC, and MBC/MBN. But the pure and mixed stands of Alnus are positively correlated with total N, K, Ca, Mg, P available, water content, BMR, and MBN, showing the soil fertility of these stands and encouraging users to cultivate this species in the form of afforestation or agroforestry.

کلیدواژه‌ها [English]

  • Caspian poplar
  • Afforestation
  • Microbial respiration
  • Caucasian alder
  • Soil nutrient
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