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| Studies on Epidemiological Laws and Incidence Factor of Tipburn in Baby#br#
Chinese Cabbage |
| DONG Ji-de 1，2，FU Jiang-peng 3，CHEN Guang-quan 1*，XING Hui-qin 1 |
1 Engineering Research Center of Crop Water，Fertilizer and Pesticide Integration of Hexi University，Zhangye 734000，
Gansu，China；2 Agricultural Technology Extension Service Center of Yongchang County，Yongchang 737200，Gansu，
China；3 Agriculture College，Ningxia University，Yinchuan 750021，Ningxia，China |
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Abstract This paper investigated and studied the epidemiological law and incidence factors of
tipburn of baby Chinese cabbage in Zhangye City，Gansu Province by field investigation and small pot
experiment．The results showed that there were 3 kinds of tipburn symptoms in fields，namely dry-type，leaf
rolling-type and rot-type．The sick leaves were concentrated in 19-40 leaves．The disease started on rosette
stage，developed slowly on heart covering stage，increased rapidly during balling period，and was basically
stable at maturity period．The occurrence of tipburn，Ca 2+ content，variety resistance，nitrogen fertilizer
application quantity，the soil total salt content，crops rotation characteristics and planting density，etc. fctors
were closely related．
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Received: 25 September 2018
Published: 07 December 2018
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