黄淮海平原麦玉两熟区粮食产量与化肥投入关系的研究

利用统计资料和通过农户调查与田间试验 ,对黄淮海平原藁城市粮食产量与化肥投入的关系进行了研究。结果表明 ,藁城市粮食生产还有很大的增产潜力 ,总体上粮食产量与化肥的投入仍然呈显著正相关关系 ,但是 ,目前实际生产中化肥施用量存在极其严重的不平衡和不合理现象 ,所以增施化肥已不再是增产的主要措施 ,而合理统筹、提高化肥的利用率至关重要 ,是节能增效的重要措施。在冬小麦 夏玉米一年两熟种植中 ,秸秆全量还田条件下 ,N、P以不同比例配合施用 ,表现出显著的产量差异 ;而且增施N、P肥 ,夏玉米的增产效果比冬小麦更为明显 ;而在N、P配施的基础上 ,施K却没有表现出增产效果。

The relationship between grain output and fertilizer input in wheat-corn cropping area of the Huang-Huai-Hai plain

The relationship between grain outputs of fertilizer in the Huang-Huai-Hai plain was studied by use statistic data, inquiring farmer, and field trial. Gaocheng County was a case study. The results shown that there will be great potential capacity to increase grain output in production, and the grain yield are positive related with the amount of fertilizer markedly as a whole, but there have been imbalance and inconsequence in using of fertilizer. It is essentially important to improve fertilizer use efficiency for save resources as well as increase yield. To increase grain output should to arrange fertilizer by planning as a whole rationally rather than to increase its amount. The trial indicated that the yield were significantly difference at different proportion of N, P and K, at the condition of all the straw andstalk return to field in wheat-corn cropping system. The effects of N and P on increasing yield on wheat more evidence than that on corn. The yields were not increased with using K.