大棚连作对韭菜综合性状的影响

Effect of on Continous Cropping on Chinese Chieves

通过定点田间试验和室内分析相结合的方法,研究了连作对韭菜产量、品质、叶绿素含量和植株营养水平的影响。结果表明:韭菜的产量与连作年限呈显著的负相关,连作对不同刀次韭菜可溶性蛋白含量影响不明显,但是随着连作年限增加不同刀次的韭菜VC含量、粗纤维含量、叶绿素含量和可溶性糖含量均下降;连作对第1刀的N素含量没有显著差异,第2刀的N素含量随着年限的增加有所降低;P素含量随连作年限的变化较为明显,随着连作年限的增加不同刀次的韭菜植株P含量减少。

Studied in the effect of continous cropping on yield, quality, chlorophyll content and nutrient of Chinese ehieves, through the combination of field experiment with laboratory analysis. The results showed that with the increase of con- tinous cropping years, yield, content of VC, soluble sugar, chlorophyll and crude fiber were decreased, but content of soluble pro did not change in different harvest times. Continous cropping did not affect on N of plant in the first harvest time, but N content were decreased with the increase of continous cropping years in the second harvest time. P of plant were decreased in different harvest times when the continous cropping years was increased.