作物籽粒中NO-3-N和NO-2-N的积累与氮肥种类和数量的关系

１９９６～１９９７在芸豆（云南）、红小豆（河北）、大豆（黑龙江）和花生（山东）绿色食品产地，研究了施用有机肥和化肥对这些作物籽粒中ＮＯ＾－３、ＮＯ＾－２的累积特点。结果表明，芸豆和红小豆不论施用有机肥还是尿素，土壤中的速效氮与籽粒中ＮＯ＾－２的灰色关联最好；施用有机肥的最大关联度分别出现在土壤库内部（全氮与速效氮之间）或籽粒库内部（ＮＯ＾－３、ＮＯ＾－２之间）；而施用化肥的最大关联度分别出现在土壤

Relationship of NO-3-N,NO-2-N accumulation in some crop seeds with N fertilizers application

From 1996 to 1997, the effect of applying organic and chemical fertilizers on NO3- and NO2- accumulation in crop seeds was studied in four green food bases of kidney beans (Yunan Province), red small beans (Hebei Province), soybeans (Heilongjiang Province), and peanuts (Shandong Province). For kidney beans and red small beans, the highest grey correlation was existed between available N in soil and NO2- in seeds, no matter whether organic fertilizer or urea was applied. In organic fertilizer trials, the highest grey correlation appeared in soil pool (between total N and available N) or seed pool (between NO3- and NO2-), while in chemical N fertilizer trials, it existed between total N in soil and NO3- in seeds. For kidney beans and red small beans, the dynamics of NO3-/NO2- in seeds was different with the kind of fertilizers applied. Extremely significant negative linear correlation and positive linear regression were existed between the content of NO3- and NO2- in all four crop seeds.