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研究作物的需肥规律,绿肥肥效和计算化肥的利用率等,都必须运用常规分析法化验大量的植株样品,植株样品分样得当与否,都直接关系到化验结果能否反应田间作物的生态状况.总结我们多年来综合运用方格法、隔节隔叶法、对分法和四分法等对各种植株化验样品的分样方法,供有关方面参考.1、化验各种植株的籽实,对大田、小区,盆栽或某些固定植株上取出的籽实样品,用方格法或四分法,经多次分样,可分取化验样品.玉米也可不脱粒,在选出的玉米穗上,用隔若干行取一行的方法,组成原始
To study the law of fertilizer requirement, the efficiency of green manures and the utilization rate of chemical fertilizers, a large number of plant samples must be tested by routine analytical methods. Whether the samples are properly sampled or not is directly related to whether the test results can reflect the ecology of field crops Situation.Conclusion We have used the method of dividing samples of various plants for a long time, such as grid method, septum-partition leaf method, dichotomy method and quaternion method, for the reference of relevant departments.1, , On the fields, plots, potted plants or some fixed plants removed seed samples, with the grid method or quarter method, after multiple sub-samples can be divided laboratory samples may not be threshing corn, corn ear in the election On, with a few lines to take a few lines of each method, the original composition