The invention relates to a vegetable cultivation system capable of utilizing cow dung fermentation heat. The vegetable cultivation system capable of utilizing cow dung fermentation heat comprises a main supporting frame, a cow dung layer, a seeding bed and a plastic film layer. The vegetable cultivation system is mainly applied to the cultivation of vine melons and fruits such as pumpkins, muskmelons and watermelons; heat which is produced in the process of the fermentation of piled cow dung acts on vegetable cultivation, while heat can be insulated in hot days in summer; nutrients can be provided for vegetables at the late stage of cow dung fermentation, moreover, after the vegetables and fruits are harvested, the fermented compost can be returned to a farmland in order to raise soil fertility, and thereby a circular cultivation pattern in which resource utilization is in coordination with environmental protection is established; the cultivation pattern is applicable to the semiarid climate and environment of the north, and can reduce initial investment such as facility construction. Moreover, daily management is simply the switching of an irrigation pump, management is convenient, and the other work of peasants and herdsmen is not affected.

Vegetable cultivation system capable of utilizing cow dung fermentation heat

The invention discloses a compost heat insulation greenhouse which comprises main beams, vertical supporting columns, greenhouse frameworks, a top film, top film frameworks and a compost heat supply device. One end of each vertical supporting column is fixed onto the ground, the other end of each vertical supporting column is vertically connected with the corresponding main beam, the greenhouse frameworks arranged on the main beams and the vertical supporting columns, the top film includes an outer film and an inner film and is positioned on the greenhouse frameworks, the top film frameworks are arranged between the inner film and the outer film, the compost heat supply device comprises a compost layer, more than one water pipe is pre-embedded in the compost layer, and the output end of the water pipe extends between the inner film and the outer film. According to the technical scheme, conveyed liquid in the water pipe is heated by heat generated by compost reaction in the compost layer, the liquid in the water pipe is conveyed between the inner film and the outer film after being heated, the temperature in the greenhouse is increased, vegetables planted in the greenhouse are effectively cultured, and growth and development of the vegetables are facilitated.

Compost heat insulation greenhouse

The invention is directed to a method for determining fresh grazed grass intake over a grazing time period for a cow population, said method comprising the steps of: providing a number of milk samples that are collected from the cow population over said grazing time period and over a reference time period without fresh grass grazing; analyzing said milk samples and determine the amount of one or more biomarkers present in each of the milk samples; and comparing the amount of one or more biomarkers present in the milk during said grazing time period to the amount of one or more biomarkers present in the milk during the reference time period to obtain an indicator of fresh grazed grass intake for the cow population over the grazing time period.

Fresh grazed grass indicator.

The invention provides a greenhouse supplying heat by using compost, and belongs to the field of compost heat supply. The greenhouse comprises a main beam, vertical supporting columns and a greenhouseframework, wherein one end of each vertical supporting column is fixed on the ground, the other end of the corresponding vertical supporting column is perpendicularly connected with the main beam, and the greenhouse framework is arranged on the main beam and the vertical supporting columns; the greenhouse further comprises top film, a top film framework and a compost heat supply device, wherein the top film comprises inner film and outer film, the top film is located on the greenhouse framework, the top film framework is located between the inner film and the outer film, and an output end ofthe compost heat supply device extends to the position between the inner film and the outer film. The greenhouse supplying heat by using the compost has the advantages that hot gas is generated by thecompost in the compost heat supply device to enter the position between the inner film and the outer film, so that the temperature in the greenhouse is increased, a good breeding effect on vegetablesplanted in the greenhouse is achieved, the growth and development of the vegetables are facilitated; and the top film in the greenhouse is double-layer heat insulation film, so that heat in the greenhouse is not lost easily, thereby achieving an ideal heat insulation effect.

Greenhouse supplying heat by using compost

The invention discloses an alfalfa fresh grass storage additive and a preparation method thereof. The additive is prepared from sodium benzoate, sodium propionate and water in a weight ratio of (0.38-0.42) to (0.12-0.08) to 1. The preparation method comprises the following steps: weighing the sodium benzoate, the sodium propionate and the water in a proportion firstly; adding the sodium benzoate and the sodium propionate into the water; uniformly stirring to prepare the alfalfa fresh grass storage additive. Alfalfa silage prepared from the alfalfa fresh grass storage additive has the yellow green color and is delicious in taste, and dairy cow like to eat the alfalfa silage; after the alfalfa silage is stored for half a year, the test analysis shows that the content of ammonia nitrogen and butyric acid is very low, and the nutritive value of the stored alfalfa silage is as the same as that of fresh alfalfa; after the alfalfa is stored for one year, the apparent identification shows that the content of the alfalfa is still in a normal level; alfalfa silage dairy cow feeding tests show that after the dairy cow are fed with the alfalfa silage, the milk production and the feed conversion ratio can be increased; in the test period of the whole three months, tested cow have no bad symptoms and are good in health condition.

Alfalfa fresh grass storage additive and preparation method thereof

The utility model relates to an utilize vegetable cultivation system of cow dung fermentation heat, this utilize vegetable cultivation system of cow dung fermentation heat includes: main part support, cow dung layer, seed bed, plastics rete, the main part support sets up in the centre of vegetable cultivation system, including the standpipe with violently manage, the cow dung layer sets up on the right side of main part support, the seed bed setting is in the left side of main part support, the setting of plastics rete is outside the vegetable cultivation system, the main part support still includes: tapered pipe, first curved expert, first tee bend, the curved expert of second, second tee bend, third tee bend, the curved expert of third, pvc standpipe, pvc violently manage, the tapered pipe linked together with first standpipe through first curved expert, and the standpipe passes through the curved expert of second, second tee bend, third tee bend and curved expert of third and is in the same place with horizontal union coupling

Utilize vegetable cultivation system of cow dung fermentation heat

The invention discloses a method for monitoring emission concentration of methane. The method utilizes a monitoring cage comprising a cage body (1), a cage door (2), a cage bottom (3) and a cage top (4), wherein one side of the cage door (2) is connected to a side frame through two hinges; a lock catch or a bolt lock is arranged at a frame shared by the other side frame and the cage door (2); universal wheels (5) are arranged at four corners of the cage bottom (3); a monitoring instrument (6) is arranged on the cage top (4). The monitoring steps and tools of the technical scheme of the method are simple; the method is easy to grasp, and suitable for popularization and application.

Cui Yanwei

Papers

Vegetable cultivation system capable of utilizing cow dung fermentation heat

Alfalfa fresh grass storage additive and preparation method thereof

Utilize vegetable cultivation system of cow dung fermentation heat

Method for monitoring emission concentration of methane