4^(th)UI与尿素配施方式对结球白菜生长和部分品质指标的影响

Effects of different ways of adding 4^(th) urease inhibitors into urea on the growth and some quality indexes of Chinese cabbage

为研究第四类脲酶抑制剂(4^(th) UI)与尿素不同配施方式对结球白菜生长及其部分品质指标的影响,利用室外盆栽方法,以结球白菜的鲜重、株高、叶长、叶宽、叶绿素含量、可溶性糖、根系活力为检测对象,在施肥量相同的情况下,4^(th) UI掺入尿素的3种不同配施方式均能显著提高结球白菜产量、品质指标和养分指标。其中,在B组方式中,1%的抑制剂用量效果最佳,能增产32.82%;在C组方式中,0.2%的抑制剂用量效果最佳,能增产80.49%,株高提高17.34%,结球白菜的总氮和总磷含量分别提高61.36%和78.85%,根系活力提高26.61%;在D组方式中,0.2%的抑制剂用量效果最佳,能增产50.01%。在同一配施方式下,中低浓度的脲酶抑制剂掺量对作物增产效果最佳;在抑制剂浓度相同的3种不同配施方式下,以C组方式及其在此种配施方式下掺入尿素含量0.2%的4^(th) UI分别为最佳抑制剂配施方式和最佳抑制剂用量。

In order to study the effects of the different ways of adding 4^(th) urease inhibitor(4^(th) UI)into urea on the growth and some quality indexes of Chinese cabbage,parameters such as the fresh weight,plant height,leaf length,leaf width,chlorophyll content,soluble sugar and root activity of Chinese cabbage were studied by outdoor potting method in this paper.The results showed that the yield,quality index and nutrient index of Chinese cabbage could be improved under three different ways and dosage of adding inhibitors into urea.Among them,1%of the inhibitor concentration in group B combined with urea had the best yield increasing effect,reaching 32.82%.0.2%of the inhibitor concentration in group C had the best effect,with yield increasing by 80.49%,plant height increasing by 17.34%,total nitrogen content of plants increasing by 61.36%,and total phosphorus content of plants increasing by 78.85%,the root activity of cabbage increasing by 26.61%.In group D,the best effect was 50.01%when 0.2%urease inhibitor was added into urea.In the same method of administration,the urease inhibitors with low and medium concentration had the best effect on increasing yield of crops.Comprehensive consideration,the group C with adding 0.2%inhibitors into urea was the best way.The results can provide a basis for the application of this new type of slow-release urea in agriculture.