杂交中稻在不同地域和施氮水平下氮、磷、钾稻谷生产效率的差异性研究

摘要

以杂交中稻高产品种‘Ⅱ优7号’和高产优质新品种‘渝香优203’为材料,在西南稻区4省(市)的7个生态点采用相同的试验方案,研究了氮、磷、钾稻谷生产效率与地理位置、土壤基础肥力、施氮量的关系.结果表明,氮稻谷生产效率在品种间、地点间及施氮水平间的差异均达极显著水平,试验地点与施氮水平间的交互作用显著;磷和钾的稻谷生产效率表现为地点间和施氮水平间差异显著或极显著.‘渝香优203’比‘Ⅱ优7号’的氮稻谷生产效率极显著提高.氮、磷、钾的稻谷生产效率间相互呈极显著正相关关系.在低经度、高海拔地区,以及土壤有机质和有效磷含量高、pH值高、施氮水平低条件下,氮、磷、钾的稻谷生产效率较高.%The experiment was conducted with 2 mid-season rice combinations grown under the condition of different ecological site,basic fertility of soil and the level of N application in 2009.The data were analyzed by variance,correlation,regression and partial correlations.The results indicated that the differences of grain productive rate (GPR) of N are highly significant in different experiment combinations,sites,and levels of N application.The mutual effect of experiment site and N application level was significant on GPR of N,the differences of GPR of P,K in different experiment sites and N application levels were significant at 0.01 or 0.05 level.GPR of N of'Yuxiangyou 203'was higher than that of'Ⅱ-You 7'.Highly significant positive correlations were observed among GPR of N,P,K.The suitable environment conditions for increasing GPR of N,P and K are low longitude,high altitude,high organic fertilizer,high available P,high pH and low level of N application.