缓释复合肥料对茎瘤芥产量、品质和养分含量的影响

采用田间试验方法，研究了不同缓释复合肥用量对茎瘤芥生物学性状、产量、品质和养分含量的影响。结果表明：与专用肥相比，施用缓释复合肥能改善茎瘤芥生物学性状，提高茎瘤产量。缓释复合肥处理的茎瘤可溶性糖含量降低，氨基酸含量增加，VC含量变化不大。施用缓释复合肥显著降低了茎瘤的硝酸盐含量，改善其卫生品质。施用缓释复合肥增加了茎瘤芥茎叶的全氮、全磷和全钾含量。在缓释复合肥的不同施用量中，综合考虑各种因素，以缓释复合肥减量5%处理，即81.7 kg·（667 m2）-1为缓释复合肥经济施用量。

Effects of Slow Release Compound Fertilizer on Yield,Quality and Nutrient Content of Tumorous Stem Mustard

Field experiments were conducted to study the effects of different slow release compound fertilizers on biological traits,yield,quality and nutrient content of tumorous stem mustard(Brassica juncea Coss. var. tumida Tsen et Lee).The results showed that compared with special fertilization,application of slow release compound fertilizers was effective to improve the biological traits and yield of tumorous stem mustard.The treatment of slow released compound fertilizer dropped the contents of soluble sugar and increased free amino acids of tumorous stem,but the change of vitamin C was not outstanding,which also decreased the content of nitrate.On the whole,slow released compound fertilizer could increase the total nitrogen,phosphorus and potassium contents of stem and leaf of tumorous stem mustard.Considering various factors,the treatment of reducing 5% slow release compound fertilizer application(1 225.5 kg·hm-2)is an optimum choice.