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在施氮肥及密度相同的条件下,免耕地的春甘蓝(Brassica oleraceaL.Capitatagroup)产量低于常规耕作地的产量。可用加大密度和施氮肥的方法提高免耕地甘蓝的产量,但其叶球重量却低于常规地。四年的试验有三年都得到甘蓝的叶球与甘蓝外部叶氮含量呈正相关的结果,而二年的试验说明施高钙肥能使甘蓝叶球重量增加。对玉米、大豆等大田作物采用免耕或少耕法耕作已被广泛公认为是可行的,但对蔬菜采用免耕法或少耕法所得出数据的报导还不多。科那沃尔等人指出用免耕或常规法移栽的西红柿和辣椒都能成活,但两种耕作方法的产量却不相同,常规耕作的产量通常都超过免耕地的产量。此调查的目的是测定植株的反映,将施肥量、密度等做为免耕和常规耕作进行对比试验项目。免耕法具备的优点是由于地面有复盖物、又不翻耕土壤而使水分含量较高,但此优点却导致根系发育不良,以及出现甘蓝叶球重量小,产量低。与常规地相比较,免耕地由于淋溶失去大量硝酸盐,因此要补充大量的氮。
Under the condition of the same nitrogen fertilizer and density, the yield of Brassica oleracea L.Capitata group on no-till land was lower than that on conventional land. Can increase the density and nitrogen fertilizer methods to increase no-yield cabbage production, but its leaf ball weight is lower than conventional. Four years of experiments showed that the content of nitrogen in cabbage leaves was positively correlated with the nitrogen content in cabbage leaves in three years. However, two years of experiments showed that the application of high calcium fertilizer could increase the weight of cabbage leaves. It has been widely accepted that no-tillage or less-tillage cultivation of field crops such as corn and soybean is feasible. However, there are not many reports of data obtained from no-tillage or tillage cultivation of vegetables. Konavell et al. Pointed out that both tomato and peppers transplanted using no-till or conventional methods survived, but yields were different for both methods of cultivation, with conventional farming generally surpassing no-till yields. The purpose of this survey is to determine the plant’s response, the amount of fertilizer, density and other non-tillage and conventional farming as a comparative pilot project. The advantage of no-till has its high water content due to the covering on the ground and the soil without plowing. However, this advantage leads to poor root development and low weight and low yield of cabbage lobular. Compared with conventionally, no-till landlords lose a large amount of nitrate due to leaching, so they need to replenish a large amount of nitrogen.