## Sow productivity index calculation

Table 2.1. Sow productivity in small and large farms in Singapore. a Farrowing index (litters per sow per year). 2.1. 2.0 Typical population distribution in a closed-herd farm and calculation of mean live weight per SPP (50 kg ALW/SPP). a and combined into indexes for selecting herd replacements. measure individual performance and to use these performance records as the basis for selection farrowed alive and dead must be recorded to evaluate sow productivity. Litters. How do we measure sow productivity? Index for seedstock (boars or gilts) used to produce replacement Calculated within the STAGES (Swine Testing and. The components used to calculate farrowing rate are given in the following equation: Farrowing rate = [total number of sows bred for a specific group Productivity increases as lactation length decreases, but lactation length can affect

## Productivity can be calculated by measuring the number of units produced relative to employee labor hours or by measuring a company's net sales relative to employee labor hours.

How do we measure sow productivity? Index for seedstock (boars or gilts) used to produce replacement Calculated within the STAGES (Swine Testing and. The components used to calculate farrowing rate are given in the following equation: Farrowing rate = [total number of sows bred for a specific group Productivity increases as lactation length decreases, but lactation length can affect return to estrus was calculated as days from farrowing to the. Estimation of Genetic populations is based on a sow productivity index that includes only litter the Malmquist TFP index show that productivity growth rates are significantly (α = 0.05) different for The integrated farms have both breeding sows and fattening pigs. output is calculated as total output minus output from pig production. Milking ability is heritable and repeatable. 泌乳能力可遗传，且可重复. Measure “ 21 day weights. 称21天龄体重. Calculate Sow Productivity Index. 计算母猪生产力

### and combined into indexes for selecting herd replacements. measure individual performance and to use these performance records as the basis for selection farrowed alive and dead must be recorded to evaluate sow productivity. Litters.

however, a selection index will be needed to ensure that post-weaning growth Litters per sow per year is calculated by using the total gestation days for a female Increasing the productive lifetime of sows in the breeding herd allows for the 4 Nov 2013 of farrowings/sow/year has been calculated, we calculate the farrowing interval by means of the formula given at the beginning of the article. 9 Jan 2019 2 popular measures used to assess sow herd productivity are Pigs per Sow per Year (PSY), and the much preferred, 'Pigs Weaned/Mated

### 28 Aug 2019 Ratios and indexes are calculations that take into account how each animal Sow Productivity Index (SPI) is a measure of milking ability and

28 Aug 2019 Ratios and indexes are calculations that take into account how each animal Sow Productivity Index (SPI) is a measure of milking ability and Algorithms for Calculating the Indices Determining the Production Efficiency of Keywords: algorithm, average mated female inventory, litters per sow per year, Reproductive productivity measurements in Japanese swine breeding herds. however, a selection index will be needed to ensure that post-weaning growth Litters per sow per year is calculated by using the total gestation days for a female Increasing the productive lifetime of sows in the breeding herd allows for the 4 Nov 2013 of farrowings/sow/year has been calculated, we calculate the farrowing interval by means of the formula given at the beginning of the article. 9 Jan 2019 2 popular measures used to assess sow herd productivity are Pigs per Sow per Year (PSY), and the much preferred, 'Pigs Weaned/Mated The farrowing index is an important parameter for the evaluation of sow productivity. The value of the farrowing index calculated over a relatively short period of What four factors are used when calculation a Sow Productivity Index? What are the three common indexes used to compare how an animal compares to the

## Sow Productivity Index (SPI). It provides a measure of sow productivity and is especially useful for making culling decisions or selecting for selecting the dams of

SPI- Sow productivity index is an indicator for a sow™s reproductive traits. This index combines the NBA and 21-day LWT. The SPI also includes a sow™s lifetime NBA and 21-day LWT data. The SPI of the average sow is 100 and any number greater than 100 is more desirable. 1970-1984, sow productivity in the United piglets reared per sow per year to 20.0 reared per sow per year. There is great variation between herds in this respect and in 1984 the top 10% of herds weaning piglets between 14 and 18 days of age were recorded as rearing 26.8 piglets per sow EPDs are commonly combined into three types of indexes; 1) Terminal Sire Index (TSI), 2) Maternal Sire Index (MSI or MLI) and 3) Sow Productivity Index (SPI). The TSI ranks animals on a combination of growth rate and backfat and should be used when selecting boars to produce terminal market hogs. The sow removal rate was high (mean = 44.2%) with a wide herd-to-herd variation (range = 16% to 100%), and correlated negatively with litter size. Calculating the ration's electrolyte balance (sodium, potassium and chloride) makes it possible to see if it is in keeping with ideal values (see table at bottom of page). A ration whose EB is too low (increased risk of acidosis) can be effectively corrected by adding Bicar®Z. How IPI Is Calculated. Industrial production and capacity levels are expressed as an index level relative to a base year (currently 2012). In other words, they do not express absolute production volumes or values, but the percentage change in production relative to 2012.

1 Nov 2018 Description of recent sow productivity, removal patterns and factors affecting In addition, the generated models offer a tool for calculating sow Table 2.1. Sow productivity in small and large farms in Singapore. a Farrowing index (litters per sow per year). 2.1. 2.0 Typical population distribution in a closed-herd farm and calculation of mean live weight per SPP (50 kg ALW/SPP). a and combined into indexes for selecting herd replacements. measure individual performance and to use these performance records as the basis for selection farrowed alive and dead must be recorded to evaluate sow productivity. Litters. How do we measure sow productivity? Index for seedstock (boars or gilts) used to produce replacement Calculated within the STAGES (Swine Testing and.