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我所从1977年起,在丘陵红壤稻田进行棉花高产栽培试验。五年来的皮棉产量及施肥量,详见下表: 五年来,以1979年皮棉亩产最高,达271.8斤,该年全所棉花试验田,包括省区试及新品种选育田共4.36亩,平均亩产皮棉208.3斤,今年我所各类棉花试验田共5.25亩,虽遇秋雨,预计皮棉亩产可达198.09斤,高产栽培试验田亩产皮棉230.04斤。近两年,我们由于按照棉花吸肥规律施肥,每斤纯氮可产皮棉十斤,较过去每斤纯氮只产皮棉
Since 1977, we have conducted high-yield cotton cultivation experiments in paddy fields in hilly red soil. In the past five years, the output of lint cotton and the amount of fertilizer applied are shown in the following table: In the past five years, the highest output of lint per mu reached 271.8 kg in 1979, and 4.36 mu of the entire cotton experimental field, including the provincial- The average yield of lint 208.3 kg, this year I have all kinds of cotton test fields a total of 5.25 acres, although the autumn, lint yield per kilogram up to 198.09 pounds, high yield cultivation test field 230.24 kg of lint per mu. In the past two years, due to the principle of fertilizing cotton in accordance with the law, we can produce up to 10 pounds of lint per catty of pure nitrogen, compared with the previous lint yield of pure nitrogen per catty