مدل‌سازی برآورد تولید میوه درخت زالزالک زرد (Crataegus aronia L.) در ذخیره‌گاه جنگلی چهارطاق استان چهارمحال و بختیاری‌

نوع مقاله: علمی - پژوهشی

نویسندگان

1 دانشگاه شهرکرد

2 دانش آموخته دکتری جنگلداری / دانشگاه شهرکرد

چکیده

هدف از این پژوهش، تخمین تولید میوه در طبقه­های قطری مختلف تاج گونهزالزالک زرد، در بخشی از رویشگاه چهارطاق واقع در استان چهارمحال و بختیاری است.30 قطعه‌نمونه دایره­ای 15 آری به­صورت منظم تصادفی برداشت شد. درختان اندازه­گیری­شده در همه قطعات نمونه به شش طبقه مساوی از نظر قطر متوسط تاج تقسیم و در هر طبقه محصول 10 درخت اندازه­گیری شد. علاوه بر این برای هر درخت انتخاب­شده ویژگی‌هایی شامل ارتفاع کل درخت، قطر برابرسینه، قطر متوسط تاج و نسبت تاج (درصد نسبت ارتفاع تاج به ارتفاع کل درخت) نیز اندازه‌گیری شد. نتایج تحلیل تولید میوه در طبقات قطری تاج نشان داد بین طبقه­های مختلف قطری تاج از نظر تولید میوه تفاوت معنی­داری وجود دارد. نتایج حاصل از مدل­سازی برآورد میوه زالزالک با استفاده از تحلیل واریانس یک‌طرفه نشان داد که مدل خطی با متغیرهای قطر برابرسینه و ترکیب قطر متوسط تاج و نسبت تاج، بهترین مدل از نظر معیارهای انتخاب مدل است. نتیجه اعتبارسنجی مدل نیز این نتیجه را تأیید کرد. نتایج تخمین این مدل نشان داد میانگین تولید میوه 7/150 کیلوگرم در هکتار است. برای این مقدار تولید در سطح 50 هکتار مورد بررسی تولید 7535 کیلوگرمی و درآمد 301400000 ریال را می­توان تخمین زد.

کلیدواژه‌ها


عنوان مقاله [English]

Modeling estimation of fruit productivity of Crataegus aronia L. trees in Chahar-Tagh forest reserve in Chaharmahal and Bakhtiari province

نویسندگان [English]

  • fateme rafiee 1
  • ali jafari 1
  • yuosef askari 2
1 shahrekord university
2 Ph.D in forestry, Shahrekord University
چکیده [English]

The main purpose of this study was to model fruit production in different crowns’ diameter classes of hawthorn trees in a part of Chahar-Tagh forest located Chaharmahal and Bakhtiari province. 30 circular plots, each with 1500 m2, were conducted using systematic random network. The trees were divided into 6 diameter classes of the crown and in each diameter class, fruits of 10 trees were measured. In addition, for each selected tree, total height, diameter at breasts height (dbh), diameter of crown and crown ratio were also measured. The results showed that there is a significant difference between crown diameters in terms of fruit production. The results of modeling estimation of hawthorn fruit using one-way ANOVA showed that linear model with variables of dbh and the combination of average diameter of crown and crown ratio are the best variables in terms of model selection criteria. The result of model validation also confirmed this result. The results of the model showed that the average fruit production was 150.7 kg/ha. Totally, for 50 hectares of forest reserve, a production of 7535 kg fruit estimated which provide an income of 301400000 Rials for local communities.

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