缓控释氮肥对不同品种水稻和玉米生长和产量的影响

Effect of slow and controlled release nitrogen fertilizer on growth and yield of rice and maize

通过田间试验研究了缓控释氮肥(SCNF)分别对两种水稻和玉米品种的生长和产量的影响。试验共设置了5个处理组,分别是Ⅰ组(对照组)、Ⅱ组(单施化学氮肥(CN))、Ⅲ组(最少的SCNF+最高水平的CN)、Ⅳ组(中等数量的SCNF+中等水平的CN)和Ⅴ组(最高量的SCNF+最低水平的CN)。研究结果表明,不同水平SCNF对不同品种的水稻和玉米的生育性状的影响不同。从产量来看,SCNF对水稻及玉米都有增产作用,而且水稻的增产幅度明显高于玉米。通过产投比分析,水稻最优施肥为最低的SCNF+最高的CN,而玉米则为最高的SCNF+最低的CN。

The effect of slow and controlled release nitrogen fertilizer（SCNF） on the growth and yield of two varieties of rice and maize was studied by comparative experiment with five groups including group Ⅰ（CK）,group Ⅱ（with only chemical nitrogen fertilizer（CN））,group Ⅲ（the lowest level of SCNF ＋ the highest level of CN）,group Ⅳ（with middle level of SCNF ＋ middle level of CN） and group Ⅴ（the highest level of SCNF ＋ the lowest level of CN）. The results showed that the amount of SCNF had different effect on the growing characteristics of rice and maize. The SCNF could raise the yield of both rice and maize,while the yield of rice rises significantly more than that of maize. It is concluded by the input-output ratio obtained from the experiments that the rice should be applied with the least amount of SCNF and the most SCNF while the maize is on the contrary.