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 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 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.

Xia Ming

Papers

Alfalfa fresh grass storage additive and preparation method thereof

Method for monitoring emission concentration of methane