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1986—1987年,在西藏农牧学院及八一镇的砂壤及轻质砂壤土农田,对春青稞进行氮磷化肥下同配合比例的对比试验,观察苗情、测定产量、经济性状,计算经济效益。结果表明,氮肥作基肥早施是提高春青稞产量的重要措施之一,氮磷配合可使春青稞分蘖与拔节期提前1—2天。氮磷施用量越大,分蘖越多,群体不协调。氮磷比由1∶0.5提高到1∶0.75时,产量随磷肥量增加而提高。从产投比值看,每亩地以用氮10.9kg、磷8.2kg为宜。
1986-1987, in the Tibetan Farming and Animal Husbandry Institute and Bayi Town, sandy soil and light sandy loam farmland, the same ratio of nitrogen and phosphorus fertilizers were compared with the spring, the observed seedlings, measured yield, economic traits calculated Economic benefits. The results showed that nitrogenous fertilizer was one of the important measures to increase the yield of spring blueberry, and the combination of nitrogen and phosphorus could make the tillering and jointing stage of spring bluegrass advance 1-2 days. The greater the amount of nitrogen and phosphorus application, the more tillers, the population is not coordinated. When the N / P ratio increased from 1: 0.5 to 1: 0.75, the yield increased with the increase of P fertilizer amount. From the ratio of production and investment perspective, the use of nitrogen per acre 10.9kg, phosphorus 8.2kg appropriate.