纳米增效尿素对杂交水稻产量及氮肥偏生产力的影响

Effects of NMUrea on Hybrid Rice Yield and Nitrogen Partial Factor Productivity

在2009年水稻生长季,以高产水稻品种皖稻153为试验材料,研究了纳米增效尿素对水稻产量及氮肥偏生产力的影响。结果表明:随纳米增效尿素施用量的增加,插秧后分蘖数、叶片SPAD值、干物质积累量均显著增加,子粒产量呈先增加后降低趋势,施氮量为225 kg/hm2时子粒产量达最大,这与普通尿素处理产量结果一致;相同施氮量的纳米增效尿素处理与普通尿素处理比较,其分蘖数、干物质积累量均显著提高;在较低施氮量条件下,纳米增效尿素处理与普通尿素处理间子粒产量及氮肥偏生产力差异不显著,随施氮量增加,差异达显著水平。总之,在试验条件下,纳米增效尿素施用量为225 kg/hm2的处理,最终子粒产量最高,达11 546.7 kg/hm2,比普通尿素增产10.2%,氮肥偏生产力为51.3 kg/kg,是氮肥运筹最优处理;纳米增效尿素施用量为135 kg/hm2的处理,子粒产量较高,氮肥偏生产力达76.5 kg/kg,是纳米增效尿素安全、节氮运筹模式。

The effects of NMUrea on hybrid rice yield and nitrogen partial factor productivity(NPFP) were investigated,with the high-yield cultivar Huaan153,in 2009.The results indicated that with the increase of NMUrea rate,tiller number,SPAD value,and accumulation amount of dry matter,increased as well.While grain yield changed as a unimodal curve and the peak appeared at the treatment with 225 kg N per hectare.At the same nitrogen rate,compared NMUrea treatments with normal urea treatments,the tiller number,SPAD value,accumulation amount of dry matter,grain yield and NPFP,all increased significantly,which indicated that NMUrea was superior to improve biological yield,grain yield and NPFP.Based on the above results,it was suggested that,under the condition of this experiment,the NMUrea treatment with 225 kg N per hectare was the best treatment,gaining the highest grain yield as 11 546.7 kg/hm2,which is a 10.2% increase than the treatment with equivalent N from normal urea,and much higher NPFP as 51.3 kg/kg.