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“种地不用问,全靠多上粪”是五十年代的观点,现在则或多或少地把增产归因于品种改良。事实上,产量高低是品种遗传性与环境条件相互作用的结果。良种是在一定环境条件下按一定目标培育出来的,有它一定的适应性和应用价值。例如:墨卡在其培育过程中,氮磷肥施用量较多,水分供应充足,单株营养面积大,加上定向选择,形成了喜肥好水和分蘖力强等品种特性。据墨西哥经验,亩产467～667斤的水平,其条件是:亩施纯氮16～19斤(约合硫铵80～90斤),纯磷5.4～8斤(约合过磷酸钙34～50斤);亩播种12斤。我区经验,墨卡是个耐肥抗倒高产品种,它的增产潜力在高肥条件下才
“Species do not have to ask, rely on more on the dung” is the fifties view, now more or less attributed to the improvement of varieties. In fact, the level of yield is the result of the interaction between breed genetic and environmental conditions. The seed is cultivated under certain environmental conditions according to certain objectives, and has certain adaptability and application value. For example: Moka in its cultivation process, more nitrogen and phosphorus fertilizer, adequate water supply, nutrient area per plant, with directional selection, the formation of Xi fat and water and strong tillering and other varieties of characteristics. According to Mexico’s experience, 467 to 667 kg per mu level, the conditions are: Mushi Shi 16 to 19 pounds of pure nitrogen (about ammonium sulfate 80 to 90 pounds), phosphorus 5.4 to 8 pounds (about the superphosphate 34 ~ 50 pounds); mu seeding 12 pounds. My experience in the district, Mexico is a high-resistant varieties of resistant to lodging, and its potential yield increase in high-fat conditions