Boron fertilization of Mediterranean aridisols improves lucerne (Medicago sativa L.) yields and quality
ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE, cilt.60, sa.5, ss.427-436, 2010 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 60 Sayı: 5
- Basım Tarihi: 2010
- Doi Numarası: 10.1080/09064710903089447
- Dergi Adı: ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.427-436
- Anahtar Kelimeler: Dissolved organic C, land use, microbial biomass C, mineralized N, nitrogen fertilization, CHEMICAL-COMPOSITION, SOYBEAN YIELD, ALFALFA
- Atatürk Üniversitesi Adresli: Evet
Özet
Wetlands are an important component of the terrestrial ecosystem, and play a crucial role in sequestering carbon. However, to date, there is little information about the land-use and nitrogen-fertilization effects on temperature sensitivity of soil respiration in wetland. In this investigation, effects of land use and nitrogen fertilization on temperature sensitivity of soil respiration (Q10) in a freshwater marsh of northeast China were studied. The results showed that change of land use significantly affected Q10-value, which followed the order: Intact Deyeuxia angustifolia wetland soil upland forest soil abandoned cultivated soil cultivated soil. Our data confirmed that soil temperature and moisture were important factors affecting Q10-values. Besides temperature and soil moisture, availability of C and N and microbial activity in soil were important factors affecting Q10-values. Nitrogen fertilization resulted in an increase in Q10-value not only in the intact wetland, but also in the cultivated soil. Although availability of N could stimulate temperature sensitivity of soil respiration, high nitrogen fertilization (i.e., 240 kg N ha-1 in this study) inhibited temperature sensitivity. Further studies are indicated as a means of answering these questions and providing additional information on the effects of nitrogen fertilization on Q10-value.