| By the experiment of potted plant, this test studied the effect of different membrane processing on the growth of rape and cabbage and the change of soil properties, which based on equal amounts of aquasorb fertilizer.The main results are as follows:1. Mulching with liquid film increased soil temperature. The effect is plastic film> sodium humic acid liquid fertilizer mulch> Shell powder liquid fertilizer mulch. And high concentrations of liquid film is better than the low concentrations.The daily mean soil temperature of cabbage covering sodium humic acid liquid fertilizer mulch28.3g·m-2was26.11. The daily mean soil temperature of rape covering sodium humic acid liquid fertilizer mulch28.3g·m-2was25.97.2Mulching with liquid film enhanced water retention of soil. The effect is:Shell powder liquid fertilizer mulch28.32g·m-2> Shell powder liquid fertilizer mulch14.16g·m-2> sodium humic acid liquid fertilizer mulch28.32g·m-2>sodium humic acid liquid fertilizer mulch14.16g·m-2. Their average water retention rate of cabbage were53.97%、51.30%、39.94%、31.68%successively, Their average water retention rate of rape is45.44%、42.58%、45.41%、42.1%successively.3. Film mulching decreased soil bulk density. The optimum covering was Shell powder liquid fertilizer mulch28.3g·m-2。Compared with the control, the soil bulk density decreased12.45%on the cabbage trials and7.96%on the rape trials.Liquid Film improved the soil granular structure content. Compared with the control, cabbage soil granular structure content was increased by26.22%and rape soil granular structure content was increased by25.23%, covering sodium humic acid liquid fertilizer mulch28.32g·m-2.4. Liquid Film improved soil fertility. In the early stage of cabbage growth, spraying sodium humic acid liquid fertilizer mulch28.3g·m-2had the largest impact on soil nitrogen, phosphorus content and organic matter content. The content of them were increased respectively by41%、88.37%and27.55%. The impact of Shell powder liquid fertilizer mulch28.32g·m-2was the most significant on potassium content which was increased by23.47%compaired with the control. In the early stage of rape growth, Shell powder liquid fertilizer mulch28.32g·m-2had the largest impact on phosphorus content with an increase of45%compared with the control. The influence of spraying sodium humic acid liquid fertilizer mulch28.3g·m-2was the most significant on soil nitrogen, potassium content and organic matter content witch was increased respectively by28.42%、35.68%and35.58%compared with the control.5Spraying sodium humic acid liquid fertilizer mulch improved the activity of soil urease, invertase and Soil respiration. Compared with the control, sodium humic acid liquid fertilizer mulch14.16g·m-2had the largest impact on invertase activity with the increase of15.66%and26.32%respectively on cabbage and rape soil; The influence of sodium humic acid liquid fertilizer mulch28.32g·m-2was the most significant on urease activity which was increased respectively by3.6%and58.98%on cabbage and rape soil; sodium humic acid liquid fertilizer mulch14.16g·m-2had the most prominent effect on soil respiration activity, the activity of cabbage and rape was respectively453.77ml/kg and339.33ml/kg.6Mulching improves plant nutrients growing. Effect on the growth of cabbage, spraying Shell powder liquid fertilizer mulch14.16g·m-2had the largest impact on nitrogen, the content was increased by6.22%, compared with the control.Shell powder liquid fertilizer mulch28.32g·m-2had the most prominent effect on phosphorus、magnesium content, the content of them was increased by217.65%、46.34%respectively, compared with the control. Spraying sodium humic acid liquid fertilizer mulch14.15g·m-2had the most prominent effect on kalium content, the content was increased by71.05%, compared with the control. Spraying sodium humic acid liquid fertilizer mulch28.32g·m-2can play the more important role in calcium content, the content was increased by50.68%, compared with the control.Effect on the growth of rape, Spraying sodium humic acid liquid fertilizer mulch14.15g·m-2had the most prominent effect on magnesium、potassium content, the content of them were increased by38.88%、44.16%, respectively, compared with the control. Spraying sodium humic acid liquid fertilizer mulch28.32g·m-2can play the more important role in nitrogen, phosphorus content, the content of them were increased by41.30%、39.21%respectively, compared with the control. Plastic mulch had the largest impact on calcium content, the content was increased by37.61%, compared with the control.7. The research showed that spraying Shell powder liquid fertilizer mulch28.32g·m-2had the most remarkable effect on chlorophyll content of cabbage and rape。The chlorophyll content of cabbage and rape was1.39mg/g,2.46mg/g respectively.and they were increased by67.46%、54.71%respectively. 8. Vegetable production increased after covering films.The effect is sodium humic acid liquid fertilizer mulch28.32g-m-2>plastic mulch>Shell powder liquid fertilizer mulch28.32g·m-2.The effect of liquid fertilizer mulch with high concentration is better than the same film with lower concentration. The yield of cabbage and rape covering by sodium humic acid liquid fertilizer mulch28.32g·m-2was the highest. The weight of cabbage and rape were1.986kg and0.356kg per plant, and yield increasing rate were50.91%and67.92%respectively.9. The content of nitrite of rape decreased significantly after covering cellulose liquid fertilizer membrane and the content of rape was less than the control group43.7%.The content of reducing sugar increased significantly in varying degrees after covering film, especially spraying cellulose liquid fertilizer membrane14.15g·m-2. the content of cabbage and rape was increased by45.99%、138.46%respectively.In summary, compared with the control, the new liquid manure mulch had reached to a significant level although it was not as effective as plastic mulch in keeping soil temperature and water retention areas. At the same time the new liquid manure mulch with high concentrations is significantly better than plastic film in improving soil fertility and soil structure, promoting plant growth and increasing crop yields. In addition, the new liquid manure mulch could be completely degraded in2months so that it had complied with the "green environment" concept. Therefore, the new liquid manure mulch is worthy to be applied and populized in agricultural production. |
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