effects of different plant residue managements on some soil physical properties and infiltration rate
نویسندگان
چکیده
improvement of soil properties through sustainable agriculture requires suitable management of plant residues. this study was conducted to investigate the effect of different types and managements of plant residue on soil physical properties in a field experiment as factorial based on rcbd with three replicates. the first factor was residue type including barley straw and alfalfa residue, and the second was different managements including 1) incorporating one percent of the plant residues with the soil (mix1), 2) incorporating 0.5 percent of the plant residues with the soil (mix0.5), 3) surface retention of plant residues (sur), 4), burning plant residues (bur) and 5) control (c). the results showed that the applied managements of plant residue had significant effects on the selected soil properties. in comparison to the control, mix1 application of barley straw resulted in the highest increases in organic carbon content (70%), total porosity (23%) and final infiltration rate (82%), and the highest reduction in bulk density (40%). in contrast, burning the alfalfa residue led to the highest reductions in organic carbon (200%), total porosity (29.5%), the final infiltration rate (30%), and the highest increase in bulk density (5.5%). in addition, mix0.5 and sur treatments improved the soil properties significantly. the highest and the least infiltration rates were found in mix1 of barley straw (48.6 mm/h) and bur of alfalfa residue (4.6 mm/h), respectively. overall, with respect to the improvement of soil properties, the managements of plant residue were prioritized as: mix1>mix0.5>sur>c>bur.
منابع مشابه
determination of some physical and mechanical properties red bean
چکیده: در این تحقیق، برخی خواص فیزیکی و مکانیکی لوبیا قرمز به-صورت تابعی از محتوی رطوبت بررسی شد. نتایج نشان داد که رطوبت بر خواص فیزیکی لوبیا قرمز شامل طول، عرض، ضخامت، قطر متوسط هندسی، قطر متوسط حسابی، سطح تصویر شده، حجم، چگالی توده، تخلخل، وزن هزار دانه و زاویه ی استقرار استاتیکی در سطح احتمال 1 درصد اثر معنی داری دارد. به طوری که با افزایش رطوبت از 54/7 به 12 درصد بر پایه خشک طول، عرض، ضخام...
15 صفحه اولthe effects of speech rate,prosodic features, and blurred speech on iranian efl learners listening comprehension
کلید واژه ها به زبان انگلیسی: effect of speech rate on listening comprehension, blurred speech,segmental and suprasegmental features,authentic speech,intelligibility, discrimination, omission, assimilation چکیده: سرعت مطالب شنیداری در کلام پیوسته بطور کلی همواره کابوسی بوده برای یادگیرنده های زبان دوم و بالاخص برای شنوندگان ایرانی. علی رغم عقل سلیم که کلام با سرعت کندتری فعالیتهای درک مطلب شن...
15 صفحه اولsome properties of fuzzy hilbert spaces and norm of operators
in this thesis, at first we investigate the bounded inverse theorem on fuzzy normed linear spaces and study the set of all compact operators on these spaces. then we introduce the notions of fuzzy boundedness and investigate a new norm operators and the relationship between continuity and boundedness. and, we show that the space of all fuzzy bounded operators is complete. finally, we define...
15 صفحه اولEffect of Incorporation of Crops Residue into Soil on Some Chemical Properties of Soil and Bioavailability of Copper in Soil
Objective: Returning crop residue to the soil exerts favorable effects on physical and chemical properties of soil. In fact, the plant residues can affect soil conditions such as pH and important role in soil fertility and cycling of elements in the soil may have. In addition to the role of the organic matter from decomposition of crop residue in increasing the concentration of micronutrients i...
متن کاملEffect of Incorporation of Crops Residue into Soil on Some Chemical Properties of Soil and Bioavailability of Copper in Soil
Objective: Returning crop residue to the soil exerts favorable effects on physical and chemical properties of soil. In fact, the plant residues can affect soil conditions such as pH and important role in soil fertility and cycling of elements in the soil may have. In addition to the role of the organic matter from decomposition of crop residue in increasing the concentration of micronutrients i...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
پژوهش های خاکجلد ۲۸، شماره ۴، صفحات ۶۵۹-۶۷۱
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023