关键词: 水稻, 水稻, 再生稻, 养分, 积累, 分配, 动态

Abstract:

In order to understand the wheat production and fertilizer application in Henan province, more than 20 counties and 452 farmers were investigated through questionnaire method , the results showed that wheat yield between 6000-7500kg/hm2 taken up the maximal proportion, being 49.77％, while wheat yield higher than 7500 kg/hm2 and lower than 4500 kg/hm2 taken up 13.53％and 12.39％. The amount of nitrogen fertilizer on wheat changed from 3.9-861 kg N/hm2 , averaged 234.6 kg/hm2, nitrogen fertilizer applied as a base fertilizer totally accounted for 54.44% of the investigated samples, the proportion of base fertilizer less than 40% of the sample accounted for 29.11%.The amount of phosphate fertilizer changed from 15.5-362.1kg P2O5/hm2, the average amount is 75.2 kg/hm2; Changes in the amount of potassium is in the 2.7-400.5 kg K2O/hm2, the average amount is 70.7 kg K2O/hm2. The wheat yield has significant relationship with the total nutrient and the amount of phosphate fertilizer, but has no significant relationship with the amount of potassium fertilizer and nitrogen fertilizer. PFP on nitrogen fertilizer changed between 15-30 kg/kg ,taken up the maximal proportion of 32.26%, 30-45 kg/kg taken up 26.96%; PFP of phosphate fertilizer between 45-75kg/kg taken up the maximal proportion of 38.30%, 75-105kg/kg taken up proportion of 29.24%; PFP on potassium fertilizer between 45-75kg/kg taken up the maximal proportion of 32.30%, 75-105kg/kg taken up proportion of 27.95%.It suggested that there existed big difference between various farmers for wheat yield ,fertilizer rate and fertilizer use efficiency.