Nutrient Management and Balanced Fertilization on Major Crops in Jilin Province

The project has been focusing on Nutrient Expert based fertilizer recommendation since 2011

IPNI-2006-CHN-JL7

02 Feb 2007

2006 Annual Interpretive Summary

Optimizing Fertilization According to Cultivar Affinity to Fertilizer, 2006

Research activities in 2006 continued with balanced fertilization studies on corn. Also, the concept of cultivar-specific fertilization was studied with a group of corn cultivars. The 14-year fixed-site field experiment determined that 113 and 225 kg K2O/ha could respectively produce 10% and 5.9% more yield, and US$125/ha and US$5/ha more profit, over the K omission check which yielded 10.6 t/ha and returned US$1,454/ha. The study demonstrated that 113 kg K2O/ha was the right rate for this area, while 225 kg K2O/ha can be considered excessive.

Ten corn cultivars were planted and fertilized with 180-75-75 N-P2O5-K2O/ha. Yields ranged between 8.5 and 12.1 t/ha and the response to fertilizer varied significantly among classes of cultivars. Simi 25, Xianyu 335, Zhengdan 958, Jidan 198, and Jidan 257 were classified as having a high response to fertilizer with yields being 30 to 60% above the check. Jidan 419, Simi 21, and Jidan 535 were classified as having a low response to fertilizer with yields being 2 to 16% above the check. Jidan 25 was classified as having medium response to fertilizer due to a 25% yield increase over the check. Jilin-NMBF