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近年来,随着生产条件的不断改善和科学技术的发展,小麦产量有了很大的提高。根据形态生理指标,运用栽培措施去调节作物与外界环境条件的关系,以满足小麦生长发育的要求,从而获得高产,是小麦高产栽培中的一个重要方面。除应用群体结构、长相、长势、叶色等指标外,国内外广泛试用和推荐植株营养诊断技术以测定植株体内速效性氮、磷、钾的含量,作为施肥依据,以期做到合理施肥和促控管理。1975—1977年我们在研究黑龙江省春小麦高产规律的过程中,结合高产田进行了植株营养诊断,对不同生育时期、不同施肥条件和不同品种的小麦植株定期取样分析,测定各部位器官中 NO_3—N 和P_2O_5的含量,研究高产栽培条件下,植株各部位器官中 NO_3—N 和 P_2O_5的变化规律及植株营养诊断技术在小麦高产栽培中的应用。
In recent years, with the continuous improvement of production conditions and the development of science and technology, wheat yield has been greatly improved. According to morphological and physiological indices, cultivation measures are used to regulate the relationship between crops and external environmental conditions to meet the requirements of wheat growth and development, thus obtaining high yield, which is an important aspect of high-yielding wheat. In addition to the application group structure, appearance, growth, leaf color and other indicators, a wide range of domestic and international extensive trial and recommendation of plant nutrition diagnosis techniques to determine the content of available nitrogen, phosphorus and potassium in plants as a basis for fertilization in order to achieve reasonable fertilization and promote Control management. During the period of 1975-1977 we studied the law of high-yielding spring wheat in Heilongjiang Province. Combined with the high-yielding fields, we conducted the nutrition diagnosis of the plants. We sampled and analyzed regularly the wheat plants of different growth stages, different fertilization conditions and different varieties, and determined NO3- N and P_2O_5 contents in different organs of plant under high-yielding cultivation conditions. The changes of NO_3-N and P_2O_5 in different organs of plant and the application of plant nutrition diagnosis techniques in high-yielding wheat were studied.