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对小麦—玉米连作系统中 N、P、K素合理运筹技术研究表明 ,无论何种运筹方式 ,两茬年单产均可获得 12 0 0 0 kg/ hm2以上产量水平 ,平均单产达到 144 34.5 kg/ hm2 。运筹技术公顷施用 N素 ,以小麦 180～ 2 70 kg和玉米 2 70～ 180 kg,小麦与玉米N素比例为 4∶ 6和 6∶ 4较为合理 ,两茬年单产平均达到 14911.5 kg/ m2。随 N、P、K素中 N素水平的提高 ,小麦、玉米籽粒全量 N和蛋白质含量均呈增加趋势 ,而蛋白质产量在小麦上呈增加趋势 ,而在玉米上则呈减少趋势
Studies on the rational operation techniques of N, P and K in wheat-corn continuous cropping system showed that regardless of the cropping pattern, yields of more than 12 000 kg / hm2 in both cropping years could be obtained with the average yield reached 144 34.5 kg / hm2. The N application of N application technology was more reasonable when the wheat yield was 180-270 kg for wheat and 2 70-180 kg for corn, and the ratio of N to N was 4-6 and 6: 4 respectively. The average annual yield of double cropping reached 14911.5 kg / m2. With the increase of N and N in P, K, the contents of total N and protein in wheat and maize increased, while the protein yield increased in wheat and decreased in maize