How to make rational use of Biogas Fertilizer in growing Citrus

Biogas slurry and biogas residue produced by anaerobic fermentation in biogas digester are good bio-organic fertilizers with aseptic, non-toxic and high fertilizer efficiency. The application to fruit trees can improve the quality and yield. This paper puts forward the following technical suggestions on how to make good use of biogas fertilizer.

Choose the application mode of biogas manure

The application of biogas fertilizer in citrus fruit trees mainly uses biogas residue as base fertilizer in winter and strong fruit fertilizer in summer. Biogas slurry was used as rhizosphere topdressing and foliar fertilization.

Rational use of biogas manure according to the phenological phase of citrus fruit trees

1. In order to make the fruit trees grow normally, the leaves pass the winter safely and ensure the high yield in the next year, 0.3% urea plus 50% biogas liquid plus 10 mg / kg of 2Quin4 color D (1 gram mixed with water 100 kg) can be used as foliar fertilizer to spray twice. Digging holes under the dripping line of fruit trees, according to the big and small roots of fruit trees, apply mature biogas dregs fertilizer 10ml 50kg plus calcium magnesium phosphate 0.5kg plus bran 0.5kg 5kg.

2. Used to attack the tip. Before the buds of spring, summer and autumn shoots grew to the big mung bean leaves and turned green, the rhizosphere fertilizer was fertilized with an appropriate amount of rotten bran water and 50 kg pure biogas liquid, once every 15 days, three times in a row. 0.2% urea plus 50% biogas slurry combined with insecticidal and anti-disease spray 2murl for 3 times can obviously play a role in attacking, strengthening, preventing insects and preventing diseases.

3. Used to protect flowers and fruits. In order to improve the flower quality of fruit trees from budding to flowering, pure biogas liquid was applied twice and bran water and fertilizer was applied twice. Foliar spraying 30% biogas slurry plus 0.2% borax and 0.1% Luwang No. 1. After flowering to the end of physiological fruit drop, root application of 2 Mel 3 times pure biogas liquid plus bran water fertilizer, foliar spraying 3 times 30% biogas slurry plus 0.2% urea or 0.1% Luwang 2 can significantly increase fruit setting rate and yield.

4. In the fruit expansion period, just like applying biogas residue fertilizer before sprouting, applying biogas residue fertilizer once and spraying 50% biogas slurry fertilizer plus 0.3% potassium dihydrogen phosphate can effectively promote fruit expansion, increase sugar content, promote fruit coloring and early ripening.

Matters needing attention in using biogas manure

1. Biogas dregs had better be applied with calcium magnesium phosphate fertilizer, turf mud at the ratio of 10:1:10 and proper bran fertilizer for 50 days as base fertilizer and fruit fertilizer.

2. The mixture of biogas slurry fertilizer as foliar fertilizer and pesticides for pest control should not use high concentration, and 30% Mur50% should be used, and the spraying time should be sprayed before 11:00 and after 3 pm on a sunny day.

3. Biogas fertilizer should not be mixed with strong alkali substances and pesticides, so as not to reduce the fertilizer efficiency.