γ-Polyglutamic acid γ-PGA can be used as a nutrient for increasing plant yield
1. γ-Polyglutamic acid γ-PGA Hydrogel and γ-PGA super hydrophilic and water retention capacity
When submerged in the soil, a film will be formed on the surface of the root hair of the plant, which not only has the function of protecting the root hair, but also is the best transportation platform for the intimate contact of nutrients, water and root hair in the soil, which can effectively improve the fertilizer dissolution, storage, transport and absorption. Prevent the precipitation of sulfate, phosphate, oxalate and metal elements, so that crops can more effectively absorb phosphorus, calcium, magnesium and trace elements in the soil. Promote crop root development and enhance disease resistance.
2. γ-Polyglutamic acid γ-PGA Hydrogel and γ-PGA balance soil pH
It has excellent buffering capacity for acid and alkali, which can effectively balance the pH value of soil and avoid the acidic soil caused by long-term use of chemical fertilizers.
3. γ-Polyglutamic acid γ-PGA Hydrogel and γ-PGA can combine and precipitate toxic heavy metals
It has excellent chelating effect on toxic heavy metals such as Pb+2, Cu+2, Cd+2, Cr+3, Al+3, As+4.
4. γ-Polyglutamic acid γ-PGA Hydrogel and γ-PGA can enhance plant disease resistance and resistance to stress
Integrates plant nutrients, water-active components in the soil, and enhances resistance to symptoms caused by soil-borne phytopathogens.
5. Promote production increase
It can rapidly increase the production of agricultural products such as tea, fruits and vegetables, and the increase in output can reach 10-20%.
Planting application
1. Application of Liyang Bio-polyglutamic acid fertilizer synergist in vegetable planting
Experiment time: March-May 2010
Experimental method: The plot test of polyglutamic acid fertilizer synergist was mainly carried out in the greenhouse. At this time, the experimental method is to mix different amounts of crude polyglutamic acid extract (provided by Nanjing University of Technology) with fertilizer, and then apply the fertilizer with adsorbed polyglutamic acid as the base fertilizer of crops. The later field management is the same as this Daily management of crops.
Experimental results: Polyglutamic acid has obvious effects of increasing yield and saving fertilizers on various crops. There is no test of increasing yield. The yield of polyglutamic acid treatment is also comparable to that of the control treatment using 100% base fertilizer. The results are shown in Table 1.
Table 1 Growth effect of various crops after using polyglutamic acid
2. Application of Liyang Bio-polyglutamic acid fertilizer synergist in rice planting
3. Experiment time: May-August 2009
Experimental method: The test crop was rice Kongyu 131, the size of the transplanted rice was 30 × 10 cm, the number of transplanted seedlings per hole: 5-7, and the transplanting date was May 23, 2008. About 75 grams of crude polyglutamic acid is mixed with the fertilizer used per mu. The specific fertilizer amount and results are shown in Table 2.
Experimental results: The results of the rice field showed that the treatment with a weight loss of 20% was comparable to the control, the treatment with a weight loss of 40% was weaker than the control, and the treatment with no weight loss and polyglutamic acid was significantly better than the control.
Table 2 Field survey data of polyglutamic acid fertilizer saving effect test (rice)
Note: The formula of polyglutamic acid blend fertilizer is: N 23.3%, P2O5 10%, K2O 17.3%, 0.25% polyglutamic acid (PGA); treatment 1 was conventional fertilization; treatment 2 was conventional fertilization and increased PGA; treatment 3 increased Apply PGA and lose weight by 20%; in treatment four, apply PGA and lose weight by 40%.
4. Application of Liyang Bio-polyglutamic acid fertilizer synergist in corn planting
Experiment time: June-November 2009
Experimental method: the test crop is corn, treatment 1: nitrogen fertilizer 10kg per mu; treatment 2: nitrogen fertilizer 10kg+5g polyglutamic acid per mu; treatment 3: nitrogen fertilizer 20kg per mu; treatment 4: nitrogen fertilizer 20kg per mu+ 5g polyglutamic acid. Fertilization method: Nitrogen fertilizer and crude polyglutamic acid are mixed and drenched.
Experimental results: the plant heights of treatment 2 and treatment 4 were increased by 3.7% and 5.6% respectively compared with treatment 1, and the yield increase rates are shown in Table 3. At the same time, the economics of using polyglutamic acid in corn fields is estimated. According to the corn test conducted in Sunjiazhuang Village, Donggang Town, Qinhuangdao City, Hebei Province in 2008, adding polyglutamic acid can reduce the use of chemical fertilizers by more than 10%. , the yield of corn per mu increased by more than 6%, the investment per mu was 11.25 yuan, and the increase in efficiency per mu was more than 40 yuan. The results are shown in Table 4.
Table 3 Field survey data of polyglutamic acid fertilizer saving effect test (maize)
Table 4 Economic Calculation in Corn Planting
Note: For corn planting, 25kg of compound fertilizer is applied as base fertilizer, and the price of compound fertilizer is 4,000 yuan/ton; for the experimental treatment, 30g of crude PGA is applied per mu. The yield per mu is 564.7kg, the price of corn is 1.4 yuan/kg in economic estimation, and the price of agricultural grade PGA is 150 yuan/kg.
5.Application of Liyang Bio-polyglutamic acid fertilizer synergist in the cultivation of flue-cured tobacco leaves
Experiment time: March-July 2009
Experimental method: During the top-dressing period, different concentrations of polyglutamic acid were added to the tobacco-specific fertilizer to investigate the effect on the yield and quality of tobacco leaves. The experimental group (1 mu) and the control group (1 mu) had the same sowing and field management. The addition of 0.1% polyglutamic acid in the top dressing period of the experimental group, the addition of polyglutamic acid in the experimental group 2 was 0.08%, the addition of polyglutamic acid in the experimental group 3 was 0.05%, and the top dressing in the control group was ordinary fertilizer. .
Experimental results: The application of special fertilizers for tobacco leaves with different concentrations of polyglutamic acid significantly improved the yield of tobacco leaves, the rate of middle and upper tobacco, and the output value. Among them, the special fertilizer for tobacco leaves with the addition of polyglutamic acid of 0.1% had the best effect. The yield of flue-cured tobacco increased by 18.57%
