The study was carried out in field experimental plot of Qingdao Agricultural University, in Shandong Province, located in Chengyang District, Qingdao City (36° 15′N, 120°20’ E).
The study was carried out in field experimental plot of Qingdao Agricultural University, in ShandongProvince, located in Chengyang District, Qingdao City (36° 15′N, 120°20’ E).