Effects of Different Diammonium Phosphate on Winter Wheat Yield, Economic Benefits and Soil Characteristics
To study the effects of different diammonium phosphate on winter wheat yield, economic benefits and soil characteristics, this ex-periment was conducted using 'Jimai 22' as the test wheat variety. In this experiment, five different kinds of diammonium phosphate were se-lected for fertilization treatment. The test period was two years. The proportion of P2O5 in diammonium phosphate was 39％ (T1, T2), 46％ (T3, T4), 40％ (T5). The blank control did not apply fertilizer (T0). Urea (containing 45％ N) and potassium sulfate (containing 50％ K2O) were applied equally in all treatments. The results showed that the aboveground dry weight of wheat was the highest at T2 and T1 tillering stages, respectively;the aboveground dry weight and tillering number during the turning green and jointing stage were the highest at T2 and T1, respectively. Except for T0, there was no significant difference in total nitrogen, total phosphorus, and total potassium among all treatments;during the flag raising period, the aboveground dry weight was T2, with no significant difference among all treatments except T0 for total nitro-gen, total phosphorus, and total potassium;during the grouting period, the aboveground dry weight was the highest for T2 and T3, respectively. Except for T0, there was no significant difference in total nitrogen, total phosphorus, and total potassium among the treatments;during the har-vest period, there was no significant difference in plant height, total nitrogen, total phosphorus, and total potassium among all treatments ex-cept T0;the grain yield, economic coefficient, relative net income, and input-output ratio of T1 and T2 were the highest;T1 and T2 had the highest phosphorus uptake by grains, straw, aboveground parts, phosphorus fertilizer efficiency, and agronomic utilization efficiency of phos-phorus fertilizer;as the phosphorus application time increases, the total nitrogen content in the soil was not affected, the available phosphorus content decreased, and the available potassium content was not affected. The pH showed a decreasing trend, indicating that phosphorus fertil-izer will lower the soil pH. A ratio of 39％ containing P2O5 is a more suitable ammonium phosphate.
Diammonium phosphateDynamics of reproductive periodYieldEconomic benefitsFertilizer efficiency
万方数据
维普
