论文部分内容阅读
我市地处浙江中北部的杭州湾南岸,历来是以种植水稻为主的产粮区。近年来随着品种的改良,氮、磷化肥的用量增多,产量虽有所增加,但由于有机肥料用量的减少,钾肥供应不足,致使土壤钾素入不敷出。据本市第二次土壤普查2370个水稻土样分析统计,土壤速效钾含量小于50ppm的有1276个,占53.39％;含量在50～80ppm的有845个,
The city is located in the south bank of Hangzhou Bay in the north-central part of Zhejiang Province. It has always been the grain-growing area where rice is mainly planted. In recent years, with the improvement of varieties, the amount of nitrogen and phosphorus fertilizers increased, although the increase in yield, but due to the reduction of the amount of organic fertilizers, insufficient supply of potash, resulting in insufficient soil potassium make ends meet. According to the statistics of 2,370 paddy soil samples from the second soil survey in this Municipality, there are 1276 available potassium contents of less than 50ppm in the soil, accounting for 53.39%; 845 in the content of 50 ~ 80ppm,