| It is generally believed that when the content of effective silicon in soil is lower than that of 100mg/Kg,the plant will appear as a silicon deficiency phenomenon.In order to solve the problem of poor quality of Muskmelon due to the return of plant silicone nutrition and improper management of fertilizer and fertilizers,silicon is the essential nutrient element of plant growth and has important physiological and biochemical functions.Therefore,this paper mainly collects the representative soil of 14 prefecture-level vegetable producing areas in Guangxi Zhuang Autonomous Region,and investigates the abundance and shortage of available silicon in soil.Using the "good fortune 11th" of muskmelon cultivars,the silicon fertilizer of 5Kg/667m2,20Kg/667m2,3 5Kg/667m2,50Kg/667m2,65Kg/667m2 and 80Kg/667m2 were applied in the culture medium.In the case of a thick-skinned melon without silicone fertilizer,the effects of different dosage of silicon fertilizer on photosynthetic physiological characteristics and fruit quality of muskmelon were studied,and the effects of different dosage of silicon fertilizer on the absorption and utilization of other mineral elements and other mineral elements in Muskmelon cultivation were investigated.The main findings are as follows:The results from 160 samples of vegetable soils showed that the average effective silicon content was 100.25 mg/Kg,and the whole content range was 16.07?343.57 mg/Kg.Of these,there are 21(<50mg/Kg)of silicon-deficient soils,82 in silicon-deficient soils(50?100 mg/Kg)and 57 in silicon-rich soils(>100 mg/Kg),which shows that the main vegetable-producing areas in the survey are obviously deficient in silicon.Adding a certain amount of silicon fertilizer(<65Kg/667m2)to the cultivated medium can effectively increase the yield of muskmelon,and increase the yield with the increasing of the content,but the yield of muskmelon is decreasing again when the content of silicon fertilizer is too high(>65Kg/667m2).When the dosage of silicon fertilizer was 65Kg/667m2,the quality of melon fruit could be improved significantly,but when the dosage of silicon fertilizer was lower than that of 65Kg/667m2 or 65Kg/667m2,the content of nutritive quality index of Muskmelon fruit had a certain decline.It is indicated that the dosage of high or low silica fertilizer is unfavorable to the formation of the nutritional quality of Muskmelon.It is indicated that the appropriate increase of silicon fertilizer(65Kg/667m2)can increase yield,improve quality and increase the amount of silicon fertilizer(?80Kg/667m2),and its yield and quality have decreased.In the treatment of 65 Kg/667m2 silicon Fertilizer,the net photosynthetic rate and transpiration rate of muskmelon leaf increased significantly compared with control,obviously,the photosynthetic ability of plant and the water absorbing ability of root system were improved effectively.The effective nitrogen and phosphorus in the culture substrate during the treatment of 65 Kg/667m2 silicon Fertilizer,the contents of potassium,calcium and silicon were significantly lower than those of the control,while the contents of nitrogen,phosphorus,potassium,calcium and silicon in different organs of muskmelon were significantly higher than those in control,which showed that the absorption and utilization of effective nitrogen,phosphorus,potassium,calcium and silicon in the cultivated medium were promoted effectively.The contents of mineral elements in different organs of muskmelon were improved effectively.It is explained that the suitable dosage of silicon fertilizer(65Kg/667m2)plays an important role in the photosynthetic physiological characteristics and fruit quality of muskmelon. |
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