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Effect of Chitosan on Zizania Caduciflora and the Compare on Cultivars of Zizania Caduciflora

Author: ZhangNie
Tutor: ShouSenYan
School: Zhejiang University
Course: Olericulture
Keywords: Zizania caduciflora chitosan concentration time yield quality effect cultivars compare
CLC: S645.2
Type: Master's thesis
Year: 2006
Downloads: 82
Quote: 0
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Abstract


Zizania caduciflora is perennially hydrophytic herb that is a member of the Gramineae family, which is a swelling stalk after parasitized by Ustilago esculenta. It is a nutrient vegetable, good for the health, and cultivated in the south of the changjing river, which is one of the important hydrophytic vegetables. Zizania caduciflora has tow types, one is harvested once a year, the other is harvested twice a year. In resent years, along with mending the regulation of plant-structure, Zizania caduciflora is cultivated more and more, and the vegetable market is enriched mostly. So, for carrying the high yield and high quality of Zizania caduciflora, this research is to study the impact of the chitosan on different types of Zizania caduciflora, and the difference of cultivars of Zizania caduciflora is compared.1. Effect of chitosan on different types of Zizania caduciflora: In seedling phase of Zizania caduciflora, the chitosan of 30mg/L, 45mg/L, 60mg/L are used to the 0501 which is harvested once a year and the 0505 which is harvested twice a year. The result shows that the chitosan can increase the the amount of effective tiller, then the yield of both of cultivars of Zizania caduciflora is enhanced markedly, and the concentration of 45mg/L of the chitosan has the best effect. The activity of POD in leaves and the content of sucrose in product can be increased after using the chitosan, and the change of the chlorophyl content could be abated and the effect has a long duration, and the furthersome effect of chitosan on the activities of the CAT and the APX lasts in the prophase and the midphase of growth. The effect of chitosan on the high of the plant and the content of the free amino acid is different to different cultivars of Zizania caduciflora, it is good for the 0501, and it is less effect on the 0505.2. Effect of the different ways of using the chitosan on Zizania caduciflora: The chitosan of 30mg/L, 45mg/L, 60mg/L and the chitoking (a nutrition supplementary) of 45mg/L are used in seedling phase of the 0501, and the chitosan of 30mg/L, 45mg/L, 60mg/L and the admixture of the chitosan and the chitoking in the same concentrations are used in the tillering phase of the 0501. The result shows that the different concentration of the chitosan and the chitoking used in different phases on Zizania caduciflora all can enhance the yield markedly, and 45mg/L is the best using concentration, and the tillering phase is the best using phase. In all of the treatment, while 45mg/L chitosan is used with the same concentration chitoking in the tillering phase, the yield could be enhanced by about 35%, which was the best result.3. Compare on the cultivars of Zizania caduciflora: Choosing different types cultivars of Zizania caduciflora for different planting situations, the reap time, the yield, the quality of seven cultivars of Zizania caduciflora which are numbered 0501 to 0507 are compared. The result shows that the 0503 ripes earlier and suits to be a cultivar of Zizania caduciflora reaped earlier than usual in spring. The 0501 also ripes a little earlier, so the 0503 and the 0501 both suit to be cultivars of Zizania caduciflora reaped earlier than usual in autumn. The 0504, the 0505 and the 0506 all have high yield, in some special situation they can be planted in flowing cold water or planted in high hills to harvest earlier in fall. Thought of the reap time, the yield, the quality of the appearance and the quality of the nutrition, the 0504, the 0505 and the 0506 have high yield and high quality, which can be spread and exported.

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CLC: > Agricultural Sciences > Gardening > Vegetable gardening > Water lettuce > Zizania
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