تاثیر برخی از پارامترهای محصول و خاک بر صدمات و خصوصیات مکانیکی سیب زمینی در حین و پس از برداشت

نوع مقاله : مقاله پژوهشی

نویسندگان

عضو هیات علمی بخش تحقیقات فنی و مهندسی مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی خراسان رضوی

چکیده

در این تحقیق، تاثیر سه رقم (سانته، آگریا و فونتانا)، سه زمان برداشت (اواسط شهریور، اوایل و اواسط مهرماه) و دو مقدار رطوبت خاک (9 و 15 درصد) بر صدمات مکانیکی ایجاد شده و بعضی خصوصیات مکانیکی در حین برداشت مکانیکی و پس از یک دوره انبار مانی دو ماهه سیب زمینی بررسی شد. نتایج نشان داد رقم، تاریخ برداشت و رطوبت خاک تاثیر معنی داری بر میزان صدمه وارده بر سیب زمینی در حین و پس از برداشت دارد. از این نظر رقم آگریا بیشترین میزان صدمه را نسبت به دو رقم سانته و فونتانه دارا بود. بیشترین میزان صدمه مربوط به برداشت در خاک دارای رطوبت 9 درصد بود و کمترین میزان صدمه مربوط به برداشت در خاک با رطوبت 15 درصد بود. در برداشت زود هنگام بیشترین میزان صدمه و برداشت دیر هنگام کمترین میزان درصد صدمه به سیب زمینی حاصل شد. رقم، زمان برداشت و مدت انبارمانی اثر معنی داری بر روی خصوصیات مکانیکی داشت بیشترین انرژی شکست مربوط به رقم فونتانه و کمترین آن مربوط به رقم آگریا بود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of some crop and soil parameters on mechanical damage and Mechanical properties of potato during and after harvesting

چکیده [English]

In this study, the effect of variety, harvesting time and soil moisture on mechanical of samples, during harvest and storage time of two month. Moreover, the effect of these parameters on rheological properties such as rupture energy, Strength against penetration, and stress relaxation has been investigated using factorial design. The results showed that variety, harvesting time and soil moisture have a significant effect on potato damage during harvesting and after storing time. From this point of view, Agria, Sante and Fontane varieties have the most damages respectively. The maximum amount of damages was related to soil moisture with situation of wilting point (9 percent), and minimum amount of damages was related to soil moisture with field capacity (15 percent). During harvesting the Max and Min amount of losses were obtained during early harvesting (middle of September) and late harvesting (middle of October), respectively.
The maximum and minimum energy required for rupture was 87.22 and 73.34 E-3 joule related to Fontane and Agria respectively. Strength against penetration was 6.76, 6.56 and 6.26 N for Fontane, Sante and Agria respectively. Max amount of stress relaxation was 72.36% for Fontane by Santa and Agria with 71.20 and 69.04 percent.

کلیدواژه‌ها [English]

  • potato
  • damage
  • Mechanical Harvest
  • Mechanical properties
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