浙北单季晚稻区测土配方施肥指标体系研究

Study on Soil Testing and Formula Fertilization Index for Single Late Rice in Northern Zhejiang

[目的]研究建立单季晚稻测土配方施肥技术指标体系。[方法]设9个处理,3次重复,随机区组排列,共计27个小区。[结果]施用氮肥对水稻叶面积指数的影响较大,与水稻孕穗期、成熟期干物质积累呈0.01水平显著正相关。该地区晚稻测土配方施肥推荐氮肥(折纯氮)为187.5～195.0 kg/hm2。钾肥用量与水稻成熟期干物质积累呈0.01水平显著正相关,在一定范围内与产量呈0.01水平显著正相关,但与叶面积指数、公顷颖花量相关性不显著。[结论]该地区推荐用量为K2O纯量67.5～90.0 kg/hm2。

[ Objective ] The research aimed to study the soil testing and formula fertilization index for single late rice. / Method J Nine fertiliz- er treatments were designed, with random arrangement and 3 replications. [ Result ] Using nitrogen fertilizer had. greater impact on leaf area in- dex of rice, and had a highly significant positive correlation with dry matter accumulation in rice booting and maturity stage. In this region, the recommended nitrogen fertilization （pure nitrogen） was 187.5 -195.0 kg/hm2. There were significant and positive correlations between po- tassium fertilizer and dry matter accumulation of rice maturity stage, and with the production within a certain range, but had no significant cor- relation with leaf area index and spikelets number. [ Conclusion] The recommended potassium fertilization of this region was pure K20 about 67.5 - 90.0 kg/hm2.