Effect of Conservation Agriculture Practices on Oat Fodder Yield, Water Use Efficiency, and Microbial Biomass C and N in Rainfed Dry Area of North- West Pakistan
- سال انتشار: 1393
- محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 16، شماره: 5
- کد COI اختصاصی: JR_JASTMO-16-5_008
- زبان مقاله: انگلیسی
- تعداد مشاهده: 92
نویسندگان
Nuclear Institute for Food and Agriculture (NIFA), Soil Science Division, Peshawar, Pakistan.
Nuclear Institute for Food and Agriculture (NIFA), Soil Science Division, Peshawar, Pakistan.
Nuclear Institute for Food and Agriculture (NIFA), Soil Science Division, Peshawar, Pakistan.
Department of Soil and Environmental Sciences, Faculty of Crop Production, Agricultural University Peshawar, Peshawar, Pakistan.
چکیده
Crop productivity, water use efficiency (WUE), and microbial biomass C and N in rainfed dry area are influenced by tillage, rotation, and crop residue management. Field experiments were conducted during ۲۰۰۵-۰۸ to study the effect of tillage, crop rotation, and crop residue retention on oat fodder yield, water use efficiency, and microbial biomass C (MBC) and N (MBN) under semi-arid conditions in north-west Pakistan. The objective of the study was to identify suitable cultural practices and fodder cropping system with improved water use efficiency for a dry area. The treatments consisted of three rotations: i) oat–fallow–oat (O-F-O)-farmers’ practice, ii) oat– summer legume–oat (O-SL-O), and iii) oat–summer cereal–oat (O-SC-O). For each rotation, there were two tillage and two crop residue management treatments: i) Tillage (crop residues removed) and Tillage (crop residues retained), and ii) No-tillage (crop residues removed) and No-tillage (crop residues retained). Basal doses of N۶۰+P۶۰ (kg ha-۱) to oat, N۹۰+P۶۰ to summer cereals and N۲۰+P۶۰ (kg ha-۱) to legumes were applied. Changes in soil water storage were monitored with neutron moisture probe for calculation of WUE. The results indicated that an average maximum dry matter yield (۷.۷۸ t ha-۱) and WUE (۲۶.۴۷ kg ha-۱mm-۱) was obtained under no-tillage+crop residues treatment. The tillage practices showed no-significant effect on oat dry matter yield and WUE. The oat yield and WUE was higher in O-F-O rotation compared to O-SL-O and O-SC-O. The surface soil (۰-۱۵ cm) analysis showed that MBC and MBN was consistently greater in the no-tillage+crop residues treatment. These results indicated that no-tillage+crop residue treatment was relatively more beneficial under the rainfed (dry) conditions.کلیدواژه ها
Crop rotation, Crop residues, Tillage, NP fertilizersاطلاعات بیشتر در مورد COI
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