译 名：
Studies on the Ratio of Available Nitrogen Application in Close Planting of the Pomegranate
作 者：
PENG Shi-cheng(XiChang College,Xichang,Sichuan 615013)
关键词：
Close planting pomegranate;Nitrogen;Ratio;Mathematical model
摘 要：
[Objective] The aim of the study was to provide basis for application of rapidly available nitrogen in close planting of the pomegranate.[Method] Using designs of simplex centre by H.Scheffe,embarking proportion of available nitrogen were studied in before blooming,after blooming and fruit enlargement period.[Result] The mathematical model was established between pomegranate yield per plant and the ratio of nitrogen application 3 times in before blooming,after blooming and fruit enlargement period under topdressing pure nitrogen 180 g per plant.[Conclusion] Through Computer optimization,the best ratio of the first,the second and the third application of nitrogen fertilizer to pomegranate was 0.4∶0.3∶0.3,the maximum output was 10.66 kg per plant.The schemes of the ouput over 9.5 kg per plant were 72 sets,and the optimal ratio was 0.390∶0.319∶0.291.
