نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته سابق کارشناسی ارشد اگرواکولوژی دانشگاه زابل

2 دانشیار گروه زراعت، دانشکده کشاورزی زابل

3 استادیار گروه زراعت، دانشکده کشاورزی زابل

4 مربی گروه زراعت، پژوهشکده کشاورزی زابل

چکیده

به منظور بررسی اثر تنش شوری و سطوح مختلف کود پتاسیم بر عملکرد کمی و کیفی کوشیا، آزمایشی در سال زراعی 96-1395 در مزرعه پژوهشکده کشاورزی دانشگاه زابل به صورت کرت-های خرد شده در قالب طرح بلوک‌های کامل تصادفی در 3 تکرار انجام شد. تنش شوری در سه سطح شامل: 1، 7 و 14 دسی زیمنس بر متر به عنوان عامل اصلی و کود سولفات پتاسیم در سه سطح شامل: 100، 200 و 300 کیلوگرم در هکتار به عنوان عامل فرعی در نظر گرفته شد. نتایج نشان داد تنش شوری باعث کاهش ارتفاع، تعداد شاخه فرعی، وزن تر و خشک گیاه، وزن خشک برگ و ساقه گردید. همچنین نتایج پژوهش حاضر حاکی از آن بود که سطوح مختلف کود پتاسیم باعث افزایش ارتفاع، تعداد شاخه فرعی، وزن تر و خشک گیاه و وزن خشک برگ و ساقه گردید. همچنین نتایج نشان داد در شوری های بالاتر، تاثیر کود پتاسیم در تعدیل اثرات شوری و افزایش ماده خشک بیشتر بود به طوری که کاربرد 300 کیلوگرم در هکتار سولفات پتاسیم در شرایط شوری 1، 7 و 14 دسی زیمنس بر متر باعث افزایش معنی دار وزن خشک به ترتیب به میزان 15.0، 20.4 و 61.2 درصد نسبت به مصرف 100 کیلوگرم سولفات پتاسیم گردید. اثر متقابل شوری و کود پتاسیم نشان داد که آبیاری 1 دسی‌زیمنس و استفاده از 300 کیلوگرم کود پتاسیم باعث افزایش صفات کمی وکیفی گردید.

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