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对巴西陆稻（ＩＡＰＡＲ９）从灌溉时期、施氮量及配比、土壤含水量三个方面进行了产量及其经济性状研究。结果表明：（１）不同生育时期灌溉，其产量达显著差异，产量大小顺序为长期灌水＞孕穗期灌水＞抽穗期灌水＞分蘖期灌水；（２）ＩＡＰＡＲ９的施氮量及配比以６６７ｍ２１２ｋｇ纯Ｎ（６０∶２０∶２０）为最优；（３）巴西陆稻的耐旱性强，生长发育的水分极限为土壤持水量的３５．９％，最适宜、利用率最高的土壤水分为土壤持水量的９０％左右。
The yield and economic characteristics of Brazilian upland rice (IAPAR9) from three aspects of irrigation period, nitrogen application rate and soil water content were studied. The results showed that: (1) The yield of IAPAR9 was significantly different among different growth stages. The order of yield was long-term irrigation> irrigation at booting stage> irrigation at heading stage> irrigation at tillering stage. (2) The nitrogen application rate and IAPAR9 were 667m212kg pure N (60:20:20) is the best; (3) The drought resistance of Brazilian Upland rice is strong, and the moisture content of growth and development is 35.9% of the soil water content, the most suitable, the highest utilization rate of soil moisture is soil Hold about 90% of water.