کمبود بارندگی و تغییر پذیری زیاد زمانی و مکانی آن، یکی از مشکلات احیای پوشش گیاهی در کشور است. با این وجود روشهای گوناگون ذخیره ریزش های جوی میتوانند با افزایش رطوبت خاک، نقش موثری داشته باشند. پژوهش حاضر به بررسی تغییرات ویژگیهای فیزیکی و شیمیایی خاک در نتیجۀ اجرای دو روش پخش سیلاب و هلالی آبگیر در مراتع خشک استان هرمزگان میپردازد. تعداد 45 نمونه خاک از سه منطقه شاهد، هلالی آبگیر و پخش سیلاب برداشت شد و ویژگیهای فیزیکی و شیمیایی خاک در آزمایشگاه اندازهگیری شد. مقایسه میانگین ویژگیهای خاک با آزمون تجزیه واریانس یکطرفه انجام شد. برای بررسی عملکرد دو روش ذخیره بارش در مقایسه با شاهد بر ویژگیهای خاک و عملکرد کل هر یک از شاخص نرخ تغییر استفاده شد. با استفاده از تحلیل همبستگی پیرسون، روابط همافزایی و مبادله بین ویژگیهای خاک بررسی شد. یافتهها نشان داد که به جز هدایت الکتریکی، اسیدیته و ارزش خنثیسازی کل، منطقه ذخیره نزولات روی دیگر ویژگیهای خاک تاثیر معنیداری داشت ( p<0.05). عملکرد ویژگیهای هدایت الکتریکی، اسیدیته، ارزش خنثیسازی کل، کلسیم، منیزیم، نیتروژن و شن منفی بود و دیگر ویژگیها دارای عملکرد مثبت بودند. عملکرد کل ویژگیهای فیزیکی و شیمیایی خاک در منطقه هلالی به ترتیب 31% و 11% و در منطقه پخش سیلاب به ترتیب 52% و 25% بود. شن با اغلب ویژگیهای شیمیایی خاک رابطۀ مبادله و معنیداری داشت ( p<0.05). بیشترین ارتباط مبادله بین شن و سیلت مشاهده شد ( p <0.01، R2=-0.99) . بیشترین همافزایی نیز بین سیلت و فسفر(+0.87=p<0.01 ، R2) و سپس فسفر و کربن آلی (+0.72=p<0.01 ، R2) خاک وجود داشت. بهطورکلی، مقدار تأثیر مثبت عملیات پخش سیلاب بر ویژگیهای خاک مراتع این منطقه خشک بیشتر از عملیات هلالی آبگیر بود.
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