新农科水稻控释肥一次性施肥新技术示范应用效果与增产机理

水稻一次性施用"新农科"控释肥示范试验。结果表明,一次性施肥与常规分次施肥相比,氮、磷施用量分别节省18.13%和29.30%,但钾用量增加6.94%;每667 m2增产稻谷36.4 kg,增产率为8.90%,每667 m2增收节支72.60元,说明该技术具有显著的节肥省工和增产增收效果。该项技术的增产机理有以下几方面:生长全程高水平氮素养分供应是水稻增产的营养基础;根系庞大,分布深广为水稻充分吸收养分和形成健壮、旺盛群体提供了可能;延缓衰老充分发挥了良种的增产潜力;抗倒伏能力强为水稻高产稳产提供了重要保证。

Effects and yield-increasing mechanism of single basal application with the "Xin Nong Ke" rice-specific controlled-release fertilizer

This paper summarized the effects of single basal application with the "Xin Nong Ke" rice-specific controlled-release fertilizer and described yield-increasing mechanism of the technique.In comparison to normal splitting application,the technique saved N and P nutrients respectively by 18.13%and 29.30% though increased K rate by 6.94%,increased grain yield by 36.4 kg/667m2 or 8.90%,and increased production profit by 72.60 RMB/667m2 in average.These fully demonstrated the superiority in saving of fertilizers and labor,and in enhancement of yield and production profit.In discussion in mechanism,improvement of N supply should be the nutritional base for increasing yields,large root system with deep and wide distribution should create the capacity for rice plants to take up plenty of nutrients thus coming into a healthy and flourish population,delay of consenescence should be able to provide the opportunity for rice to fully approach the yield potential,greater capability of lodge resistance should construct an important base for high and stable yields.