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东江丘陵区(博罗、惠阳等县一带)稻田大部分是沙质浅瘦。在水利基本解决的地区,由于农家肥来源少,施肥水平低,大面积稻田年产稻谷仍在500斤以下。近年来冬季豆科绿肥作物面积扩大,氮素化肥用量有所提高,因此,在沙质田增施有机质肥配合采用矮稈良种的基础上,如何括期追施氮肥,以达到提高肥料的经济利用,获得显著的增产效果,这是当前生产上需要解决的问题。本试验系在群众施肥水不有所提高的情况下,研究不同生育时期追施氮肥对早稻产量的影响,从而提出合理追
Dongjiang hilly areas (Boluo, Huiyang County area) most of the rice is thin and sandy. In the areas where water conservancy is basically solved, due to the small source of farmyard manure and low fertilization levels, the annual output of paddy rice in large areas is still below 500 kg. In recent years, leguminous green manure crop area in winter has been expanded and the amount of nitrogen fertilizer has been increased. Therefore, based on the application of organic fertilizers combined with dwarfing seed in sandy land, how to topdress nitrogen fertilizer during the period, so as to improve the economy of fertilizer Use, access to significant yield increase, which is the current production problems to be solved. This experiment is in the crowd of fertilized water does not improve the case of different growth stages of topdressing nitrogen fertilizer on the yield of early rice, which made reasonable chase