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本文总结了 1992～ 1994年在蔬菜上进行的 37个土施硝酸钙和 14个喷施硝酸钙的田间试验结果。结果显示 ,无论土施还是喷施硝酸钙 ,均可显著增加蔬菜产量。其中 ,土施平均增产9.1%～ 2 4 .1%,喷施平均增产 4 .2 %～ 2 7.7%,土施的增产效果优于喷施 ;蔬菜喷施硝酸钙的适宜浓度一般为 0 .2 5%～ 0 .5%;土施硝酸钙可增加大白菜 V c含量 ,但也增加各试验蔬菜的 N O3-N含量 ;土施或喷施硝酸钙均可增加大白菜、生菜、芹菜和甘蓝 Ca、Mg和 Fe含量 ,还可明显降低大白菜干烧心病和番茄脐腐病的发病率。
This paper summarizes the field trials of 37 soil-applied calcium nitrate and 14 spray-applied calcium nitrate on vegetables from 1992 to 1994. The results showed that no matter soil or spray calcium nitrate, can significantly increase the yield of vegetables. Among them, the soil yield increased by 9.1% ~ 21.4% on average, and the average yield was increased by 4.2% ~ 7.76% by spraying. The yield enhancement of soil application was better than that of spraying. The appropriate concentration of calcium nitrate sprayed on vegetables was generally zero. 2 5% ~0 5%; soil calcium nitrate can increase the V c content of Chinese cabbage, but also increase the N O3-N content of each test vegetables; soil application or calcium nitrate can increase cabbage, lettuce, celery And cabbage Ca, Mg and Fe content, but also significantly reduce the incidence of dry heart disease cabbage and tomato umbilical rot disease.