Abstract:

The effect of chemical fertilizer added with different types and contents of urease/nitrification inhibitors on the growth and yield of peanut were studied under open field conditions in brown soil. The results indicated that, against control CK1 treated with different inhibitors, the average dry weight of peanut in flowering period increased by 3.2%-23.1%, and the average stem length in mature period increased by 2.1%-10.0%, however, small effect on peanut tillering. The chlorophyll content was increased by 2.1%-10.7% in peanut flowering period. At peanut mature stage, the chlorophyll content treated with urease inhibitors NBPT1 and NBPT2 declined smaller than that treated with nitrification inhibitors DCD1, DMP1, DMP2 and DMP3. The tests also demonstrated that the peanut yield increased by 2.06%-11.65% treated with inhibitors, among them, DMP3, NBPT1 and NBPT2 with better effect. The tested results: chemical fertilizer added with inhibitors enhanced the growth and increased the yield of peanut. The main purpose was to increase fertilizer utilization rate and protect eco-environment, and to provide scientific basis for the developing and application of new type inhibitors.