Northeast Institute of Geography and Agroecology, Chinese Academy Of Sciences
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Seasonal and long-term changes in soil physical properties and organic carbon fractions as affected by manure application rates in the Mollisol region of Northeast China
No full textSnails (Mollusca: Gastropoda) as potential surrogates of overall aquatic invertebrate assemblage in wetlands of Northeastern China
No full textSpatial and Temporal Changes of Wetlands on the Qinghai-Tibetan Plateau from the 1970s to 2010s
No full textTensile properties of seminal and nodal roots and their relationship with the root diameter and planting density of maize (Zea mays)
No full textUnderstand the resilience and regime shift of the wetland ecosystem after human disturbances
No full textValidation of Global Evapotranspiration Product (MOD16) Using Flux Tower Data from Panjin Coastal Wetland, Northeast China
No full textWetland-atmosphere methane exchange in Northeast China: A comparison of permafrost peatland and freshwater wetlands
No full textThe effects of biochar addition on phosphorus transfer and water utilization efficiency in a vegetable field in Northeast China
No full textThe excessive application of fertilizer has become a serious problem for vegetable farming in China and aggravates agricultural non-point pollution. As a soil amendment, biochar has obtained worldwide attention. Irrigation and fertilization management also play an important role in controlling agricultural non-point pollution. To investigate the effects of biochar addition, irrigation and fertilization management on phosphorus (P) leaching as well as water utilization efficiency (WUE) in vegetable fields in northeast China, a field experiment with three treatments, i.e., regular fertilization and irrigation (CK), regular fertilization and irrigation with biochar addition (100WF +B) and 20% reduction of chemical fertilizers and irrigation compared to 100WF +B (80WF +B), was conducted. The P leaching amounts in 100WF +B and 80WF +B were only 15.91% and 11.36%, respectively, of that in CK. The P uptake amounts in the three treatments in descending order were 100WF +8, 80WF +B, and CK. The WUE in 100WF + B and 80WF +B were 15.3 and 25.2 kg/(ha mm) higher, respectively, than that in CK. There were no significant differences between the yield of CK and 80WF +B. The yield of 100WF +B was 3.4 t/ha higher than the yield of CK. Biochar significantly increased WUE, yield, TP (total phosphorus) and AP (available phosphorus) contents in the surface layer as well as P uptake and decreased P leaching when comparing 100WF +B to CK. Fertilization and irrigation reduction decreased P leaching and significantly increased WUE, but the yield was affected when comparing 80WF +B to 100WF + B. Biochar combined with fertilization and irrigation reduction significantly increased WUE and decreased P leaching without affecting yield when comparing 80WF + B to CK
