| A long-term (1981—2014) field experiment was conducted on Loessal soil at Tianshui city, Gansu province to investigate the effects of long-term fertilization on yield and nutrient uptake utilization of winter rapeseed. The results showed that the yield was increased significantly under the combination of chemical fertilizers and manure, with the average yield being 1 897.49 kg·hm-2 as increased by 258.02% compared with CK. The total nutrient uptake of N、P and K was 192.09、21.40、192.8 kg·hm-2, under the MNPK treatment and were increased by 259.65%, 362.20%, 76.56%, respectively compared with CK. Under the same chemical fertilizer, apparent recovery efficiency of N,P, and K were decreased by 34.87%, 22.16%, and 351.48% under the application of manure treatment. |