Study Of Different Water Soluble Fertilizer Formula Effect On Chinese Cabbage And Soil Fertility In Fertigation

China is a large country on vegetable production, whose total yield is onthe top of the world. Chinese cabbage belongs to cruciferae brassica creat,who has the broadest distribution, largest cultural area and most popularitiesamong vegetable production. To improve the yield and quality of Chinesecabbage, select the optimal water soluble fertilizer formulations of Chinesecabbage under the Guizhou climatic conditions. This experiment, with clearwater as control, Chinese cabbage as an experimental material, used thetechnology of drip irrigation of integration of water and fertilization to studythe effect of five formula of water soluble fertilizer（formula1:20–20–20+TE, formula2:20–10–30+TE, formula3:15–15–30+TE, formula4:15–30–15+TE, formula5:14–6–40+TE） on growth, yield, economicvalue and main qualities (Vc, soluble sugar and nitrate content) of Chinesecabbage and soil fertility. Results were as follows.1. Five water soluble fertilizer formulations were determined andcompared with control treatment on the growth index of plant high, dishpocket diameter and leaf area of Chinese cabbage. The result showed thatcompared with CK, the plant high, pocket diameter and leaf area of Chinesecabbage under the treatment of five water soluble fertilizer formulationsincreased to some extent. Among them, formula2is the one of most growthwith149.68%、144.51%、126.23%than CK, and formula4has the growth of 149.47%、143.66%、121.70%than CK, taking second place. From the growthwe can concluded that formula2is the most conductive to the growth ofChinese cabbage and formula4take second place.2. Chinese cabbage who were worked by five water soluble fertilizerformulations were determined and compared with control treatment on theindex of fresh weight, dry weight, yield and calculate the economic benefits.The result showed that compared with CK, the formula4has the heaviestfresh weight（220.32g/plant） and dry weight（30.36g/plant）, maximumreturn（1183.01yuan/667m2） of Chinese cabbage, and yield（1028.67kg/667m2）is highest. From production and economic benefit we can concludedthat formula4is the better conductive to the increasing of Chinese cabbageyield and the growth of economy.3. Five water soluble fertilizer formulations were determined andcompared with control treatment of cabbage qualities such as vitamin C,soluble sugar, nitrate content. The results showed that five water solublefertilizer formula can different degrees of improve the content of Vc inChinese cabbage, and the largest rise is in formula4, and its growth is210.10%; Water soluble fertilizer can improve the soluble sugar content,formula2has a biggest increase, followed by formula4, once again isformula5, and their growth are183.59%、119.97%、42.73%; Water solublefertilizer can improve nitrate content of Chinese cabbage, formula5（455.22mg/kg） is the highest leaves, followed by formula2(451.19mg/kg), once again is formula4(370.67mg/kg), but the nitrate content in formula2and5are more than432mg/kg. From the aspects of water soluble fertilizer effect onthe quality of Chinese cabbage, we inferred formula4was better than formula2and formula5.4. Five water soluble fertilizer formulations were determined andcompared with control treatment on the index of the content of nutrientelements such as N、P、K、Mg、Fe、B、Mn、Zn、Cu and calculate its utilizationrate of N、P、K. The results showed that the water soluble fertilizer canimprove the nutrient elements content in Chinese cabbage in different degrees,and benefit to the improvement of the utilization rate of nutrients, and theChinese cabbage which deal with formula4have a highest nutrient elementcontent, utilization rate of N、P、K, therefore, formula4is optimal among thefive formula.5. Determined and compared the soil fertilizer status of each treatmentrespectively, the results showed that the water soluble fertilizer can improvesoil fertility in different degrees, formula4is optimal formula among the fiveformula. But the plots of the select soil organic matter and potassium contentis low, therefore, when applying water soluble fertilizer to Chinese cabbage,we suggest add some organic fertilizer or potash in soil, and it is moreadvantageous to the improvement of Chinese cabbage yield and quality.6. Comprehensive analysis the yield, quality and nutrient absorption ofChinese cabbage and soil fertility conditions I can get the following conclusion: formula4(15-30-15+TE) is the most suitable for the index ofChinese cabbage growth, the improvement of Chinese cabbage yield andquality, soil improvement among the five formula.