caa a22 4500 445837705 CHVBK 20180317145334.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s00271-010-0251-3 doi (NATIONALLICENCE)springer-10.1007/s00271-010-0251-3 Comparison of spatial interpolation methods for yield response factor of winter wheat and its spatial distribution in Haihe basin of north China [Elektronische Daten] [Xiaojuan Li, Ling Tong, Shaozhong Kang, Fusheng Li] Yield response factor (K y) is an important basis for implementing efficient irrigation and optimal water allocation. Because K y varies in different sites, understanding its spatial distribution plays an important role in optimization irrigation in Haihe basin. After determining the K y and ET0 of winter wheat, an exponentially increasing function was found between the two parameters. Then, spherical and exponential semivariograms were chosen as proper theoretical models for ET0 and K y, respectively, with R 2 of more than 0.970. By comparing six interpolation methods as well as two procedures, i.e. ‘calculate first, interpolate later' (CI) and ‘interpolate first, calculate later' (IC), IC-RK (residual kriging) was considered as an optimal method in interpolating K y. Mapping of K y for winter wheat indicated an increasing trend from the western and northern mountainous region to the eastern plain region in the basin, with the K y of 0.783-1.668 for the dry growing season, 0.760-1.460 for the average growing season and 0.749-1.293 for the wet growing season. Moreover, the K y values were more than 1.0 over the most of this basin, indicating that yield loss was more important than evapotranspiration deficit, and there were greater effect of water stress on the yield of winter wheat. Springer-Verlag, 2010 Li Xiaojuan Center for Agricultural Water Research in China, China Agricultural University, 100083, Beijing, China aut Tong Ling Center for Agricultural Water Research in China, China Agricultural University, 100083, Beijing, China aut Kang Shaozhong Center for Agricultural Water Research in China, China Agricultural University, 100083, Beijing, China aut Li Fusheng College of Agriculture, Guangxi University, 530005, Nanning, Guangxi, China aut Irrigation Science Springer-Verlag 29/6(2011-11-01), 455-468 0342-7188 29:6<455 2011 29 271 https://doi.org/10.1007/s00271-010-0251-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00271-010-0251-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Xiaojuan Center for Agricultural Water Research in China, China Agricultural University, 100083, Beijing, China aut NATIONALLICENCE 700 1- Tong Ling Center for Agricultural Water Research in China, China Agricultural University, 100083, Beijing, China aut NATIONALLICENCE 700 1- Kang Shaozhong Center for Agricultural Water Research in China, China Agricultural University, 100083, Beijing, China aut NATIONALLICENCE 700 1- Li Fusheng College of Agriculture, Guangxi University, 530005, Nanning, Guangxi, China aut NATIONALLICENCE 773 0- Irrigation Science Springer-Verlag 29/6(2011-11-01), 455-468 0342-7188 29:6<455 2011 29 271 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer