Effects of nitrogen application and hole seedlings on the yield and utilization of orderly machine throwing of hybrid indica rice bowl seedlings
In order to screen the number of holes and nitrogen fertilizer application rate for orderly machine throwing of hybrid indica rice bowl seedlings,Weiliangyou 8612 was used as the material,the effects of hole seedling numbers (1,2,and 3 seedlings/hole) and different nitrogen fertilizer application rates (0,90,180,270,and 360 kg/hm2) on the orderly seedling throwing yield and nitrogen fertilizer utilization efficiency of rice bowl seedlings were studied in this experiment. The results indicated that the population structure and growth period of rice were synergistically influenced by the nitrogen application rate and the number of seedlings in the field. The yield was highest when treated with N18D1,at 13315.54 kg/hm2. In terms of nitrogen fertilizer utilization efficiency,at low to medium nitrogen levels,the agronomic utilization efficiency of nitrogen fertilizer showed an increasing trend with the increase of nitrogen application rate and basic seedlings,while at high nitrogen levels,it decreases with the increase of nitrogen application rate and basic seedlings. The partial productivity of nitrogen fertilizer decreases with the increase of nitrogen content and basic seedlings. Overall,appropriate nitrogen levels (270 kg/hm2) and basic seedling numbers (1-2 seedlings per hole) are beneficial for promoting rice tillering,improving nitrogen fertilizer utilization efficiency,and ultimately achieving high rice yields.
nitrogen application ratebasic number of seedlingsorderly machine throwing of bowl seedlingsrice yieldnitrogen fertilizer utilization efficiency
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