Effects of Drip Irrigation and Fertilization Frequency on Yield, Water and Nitrogen Use Efficiency of Medium and Strong Gluten Wheat in the Huang-Huai-Hai Plain of China

Drip irrigation can reduce water and fertilizer use; however, the frequency of topdressing required for drip wheat in Huang-Huai-Hai region is still unclear. Through two continuous season field experiments, yield related traits under traditional surface (border irrigation) three fertilization frequencies (DF2, DF3, DF4, that was, twice, or four times same way during growth period) cultivars (Jimai 22, Jimai 20, Shiluan 02-1) were studied. Increasing could prolong time high-level photosynthesis, increase dry matter distribution amount (DMDA) stems leaves, add weight 1000 grains; it DMDA nitrogen (NDA) stems, grains forming higher harvest index (HI) (NHI), but 20 02-1, increasing NDA, reducing a index. The improve protein content, grain number per spike, decrease spike number, medium gluten wheat, partial productivity use efficiency, while strong has yield, productivity, efficiency. In summary, more suitable region, opposite.