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肥料田间试验尤其是长期定位试验,是农业化学课题研究的基本方法之一,其特点是对试验地土壤差异要求更为严格.由于农田土壤肥力的不均匀性客观存在的现象,为尽量达到试验要求,对选定的地块需要进行匀地播种和探索播种.前者起耗竭作用,使试验地肥力趋向均一;后者则是在匀地播种的基础上进行,为合理的试验设计所必需,以提高试验的精确性并降低试验误差.我们结合专业教学的需要,于1981年在本农场首先把供试地做匀地播种,高密度种植一季青贮玉米.玉米刈割后,同年10月13日播冬小麦(宁麦3号)进行探索播种试验.针对江南种麦要求作畦排水,播前将试验地划分为72个探索小区.小麦整个生育期既不施肥也未灌溉,田间管理与大田相同.由于试验地块肥力还存在着一定差异,麦苗生长明显地表现出优
Field trials of fertilizers, especially long-term experiments, are one of the basic methods for agrochemical research, which is characterized by more stringent requirements on the differences of soils in the field due to the objective phenomenon of non-uniformity of farmland soil fertility, Requirements, the selected plots need to be sown and seeding sowing the former play an exhaustive role in the fertility of the test tends to be uniform; the latter is based on a uniform sowing, the necessary design for a reasonable test, In order to improve the accuracy of the experiment and reduce the experimental error.We combined with the needs of professional teaching, in this farm in 1981, the first trial to do uniform planting, planting high-density silage corn season.After corn cutting, October 13 Day sowing winter wheat (Ningmai 3) to explore the sowing experiment.For the requirements of southern barley planting for drainage, pre-sowing the pilot area is divided into 72 exploration area. Wheat throughout the growing period neither fertilization nor irrigation, field management and field The same as the experimental plots of fertility there are still some differences, wheat seedling growth obviously superior