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（ｎ＝１２，ｒ０．０１＝０．７０８）；施磷量与小麦产量呈极显著负相关，ｒ＝－０．７５５７＊＊（ｎ＝１２）；氮磷配施与小麦产量之间有正相关趋势，ｒ＝０．５８１（ｎ＝１０，ｒ０．０１＝０．６３２）。表１中１０个氮磷配比有９个表现比单施磷肥处理增产。说明在盐渍土区增施氮肥和氮磷配施可获得显著增产效果。表１氮磷不同用量及配比对小麦产量的影响（１９９１～１９９３年，本所）注：肥料价格均按当年统销价，下同。“土加肥”指土壤中养分与肥料中养分之和，供试品种为鲁麦１４号。（二）最佳氮磷配比１９９２～１９９３年小区试验结果（表２）表明，不同施肥量级，最佳氮磷配比略有不同：在氮加磷１０～１６公斤／亩时，最佳氮磷比均表现为１．５∶１；７公斤／亩时为２∶１；１９公斤／亩时为１∶１。也就是说，随施肥量的加大，最佳氮磷比例逐渐变低。这个结论同时也从侧面印证了盐渍土小麦对氮肥反应的敏感性和氮磷配施的特殊性，即不同于土壤有机质和全氮含量高及偏酸性的内陆土壤的施肥特点。亲２氮磷不同用且及配比对小麦产且的影响（１９９２～１９９３，本所）（三）施肥量、施肥氮磷比例与最佳土壤氮磷比值通过小区试验对空肥区小麦所吸收的养分测算，在试验地土壤肥力条件?
(N = 12, r0.01 = 0.708). There was a significant negative correlation between phosphorus application and wheat yield (r = -0.7557 * There is a positive correlation trend, r = 0.581 (n = 10, r0.01 = 0.632). Table 1, the ratio of nitrogen and phosphorus in the performance of 9 than the phosphate treatment alone yield. This indicates that the application of nitrogen fertilizer and nitrogen and phosphorus fertilizers in saline soils can achieve significant yield increase. Table 1 Nitrogen and Phosphorus Different Amount and Proportion of Wheat Yield (1991 ~ 1993, the Institute) Note: Fertilizer prices according to the year unified sales price, the same below. “Soil and fertilizer” refers to the soil nutrient and fertilizer in the sum of the test varieties for the Lumai 14th. (B) the best ratio of nitrogen and phosphorus 1992 ~ 1993 plot test results (Table 2) showed that different fertilizer levels, the best ratio of nitrogen and phosphorus is slightly different: nitrogen phosphorus 10-16 kg / mu, the most The optimum nitrogen and phosphorus ratios were both 1.5: 1; 2: 1 at 7 kg / mu and 1: 1 at 19 kg / mu. In other words, with the increase of fertilizer, the optimal proportion of nitrogen and phosphorus gradually become lower. This conclusion also confirms the sensitivity of the saline soil to nitrogenous fertilizer and the particularity of the combination of nitrogen and phosphorus, that is, different from the characteristics of fertilization of inland soils with high content of organic matter and total nitrogen and acidic soil. (2) The effect of different fertilizers on the yield and yield of wheat from 1992 to 1993 (III) Fertilizer amount, ratio of fertilizing nitrogen and phosphorus to the ratio of optimum soil nitrogen and phosphorus Absorption of nutrients measured in the test conditions of soil fertility?