Effects of adding a nitrification inhibitor dicyandiamide (DCD) on the growth and quality of rape (Brassica campestris).
Effects of adding a nitrification inhibitor dicyandiamide (DCD) on the growth and quality of rape (Brassica campestris).
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发表时间：
2010
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通讯作者：
Chuan Limin;Zhao Tong-ke;An Zhi-zhuang;Du Lianfeng;Lin Shunjiang
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作者：
Chuan Limin;Zhao Tong-ke;An Zhi-zhuang;Du Lianfeng;Lin Shunjiang
通过盆栽试验，研究了在尿素中添加硝化抑制剂双氰胺（DCD）对油菜生长和品质的影响，DCD的添加量分别为1%、2%、3%、1%、2%、3%、4%、5%、6%、10%结果表明，施用双氰胺可显著提高油菜产量22.77%~ 33.5%，降低油菜体内硝酸盐含量14.9%~ 30.51%; DCD处理也提高了植株体内全N、全P含量，当DCD用量为总N的3%时，植株体内水溶性糖含量有增加的趋势，但当DCD用量大于总N的4%时，当双氰胺用量为尿素氮总量的3%时，油菜对氮素的吸收和利用率最高，因此，适量施用双氰胺不仅可以降低油菜体内硝酸盐含量，提高产量，而且可以改善油菜品质。
Reducing nitrate concentration and improving the quality of vegetable crops have been two areas of major research efforts.The aim of this study is to determine the effects of adding a nitrification inhibitor dicyandiamide(DCD)to urea on the growth and quality of rape plants in a pot experiment.The amount of DCD added was equivalent to 1%,2%,3%,4% and 5% of the total nitrogen(N)applied.Results showed that DCD significantly increased crop yield by 22.77%～33.5%,and decreased nitrate concentration in the crop by 14.9%～30.51%.Rape Vc,total N and total P concentrations were also increased by the DCD treatments.There was a trend of higher water soluble sugar in the plant when the amount of DCD was 3% of the total N applied,but when the DCD was greater than 4% of the total N applied,the water soluble sugar concentration decreased.The highest N uptake and N recovery by the plant was when the amount of DCD added was at 3% of the total urea-N applied.Therefore,suitable amount of DCD applied could not only reduce nitrate content and increase yield,but also improve rape quality.