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Diet optimization for dairy cows to reduce ammonia emissions
2021
Kreismane, D., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Aplocina, E., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Naglis-Liepa, K., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Berzina, L., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Frolova, O., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Lenerts, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia)
Feeding livestock a balanced diet with a differentiated crude protein (CP) content, depending on the lactation phase, can reduce nitrogen emissions from livestock excrement and urine. A higher content of non-starch polysaccharides in livestock diets improves feed absorption in the livestock body and, consequently, nitrogen is emitted more from protein present in livestock manure than from urea acid present in livestock urine. The aim of the study is to calculate the ammonia emission reduction potential in Latvia by optimizing the feeding of dairy cows and ensuring life longevity, as well as provide justification for ammonia emission reduction in dairy farms. Calculations made by using the NorFor Model for optimization of dairy cow (Bos primigenius f. taurus) diets revealed that compared with lowyielding cows, a higher CP content diet fed to high-yielding cows at the beginning of lactation increased the amount of nitrogen (N) in their excrement and urine by 90–180 g dE−1. Reducing the CP content in the cow diet by an average of 10 g kgE−1 dry matter (DM) during mid-lactation resulted in the same trend. Reducing the CP content in the cow diet during late lactation and the dry period by another 20–30 g kgE−1 of DM, N emissions from excrement and urine significantly decreased. Increasing the lifespan of dairy cows also means reducing ammonia emissions from the farm. By increasing the number of lactations per cow on dairy farm, it is possible to reduce the number of heifers per cow. The total reduction of ammonia emissions in Latvia was calculated based on a long-term projection of a decrease of 0.1 heifer per dairy cow. Ammonia emissions could be reduced by 0.051 kt by decreasing the number of heifers by 12.54 thou. at the planned increase in the lifespan of dairy cows by 2030.
Show more [+] Less [-]Soil carbon stock in fertilized forest stands with mineral soils
2021
Karklina, I., Latvian State Forest Research Inst. Silava, Salaspils (Latvia);University of Latvia, Riga (Latvia) | Lazdins, A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Butlers, A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Stola, J., Latvian State Forest Research Inst. Silava, Salaspils (Latvia);University of Latvia, Riga (Latvia) | Zvaigzne, Z.A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Purvina, D., Latvian State Forest Research Inst. Silava, Salaspils (Latvia)
Forest mineral soil is one of the terrestrial carbon pools, and changes in forest management practices can affect the carbon stock in forest soil. The purpose of the study is to estimate temporal fertilization impact on mineral soil organic carbon stock, depending on fertilizers applied, forest stand type, different dominant tree species of the stands. Coniferous and birch forest stands with mineral soil in the central and eastern part of Latvia were selected for the experiment. The fertilizers used were wood ash and nitrogen containing mineral fertilizer. No significant differences in organic carbon stock in O horizon were detected 2–5 years after fertilization. A tendency of smaller organic carbon stock in upper mineral soil layers (0–10 cm, 10–20 cm) was found in most part of objects. Significantly smaller organic carbon stock was found in upper mineral soil layers (0–10 cm and 10–20 cm) in birch stands with wet mineral soil treated with ammonium nitrate if compared to the control plots, possibly due to a different soil moisture regime of forest stands. The positive and significant correlations between soil organic carbon and nitrogen stocks were found in most part of the objects.
Show more [+] Less [-]The International Fund for Agricultural Development's 2021 Rural Development Report cites A4NH evidence in its analysis of opportunities for transforming food systems
2021
CGIAR Research Program on Agriculture for Nutrition and Health
The 2021 report draws on research funded by A4NH on food system transformation and promising consumer- and food-environment- oriented policy options to include in the food systems transformation agenda in low- and middle income countries. It provides analysis to inform policies, programs and investments to promote inclusive food system transformation.
Show more [+] Less [-]Workshop: Priority Setting for Nationally Determined Contributions (NDC) - Implementation Plan in Rice Production
2021
International Rice Research Institute
26 March 2021, Ha Noi, Vietnam — the Ministry of Agriculture and Rural Development (MARD) held the first workshop in support of planning the implementation of Vietnam's Nationally Determined Contribution (NDC) in the rice sector. Aiming at setting priorities for NDC implementation in rice production, the workshop highlighted different NDC scenarios to reduce greenhouse gas (GHG) emissions while gaining economic, social, and environmental benefits sustainably.
Show more [+] Less [-]Transformation of the rural economy
2021
Otsuka, Keijiro | Zhang, Xiaobo
The chapter examines whether contract farming confers benefits primarily to large farmers in practice and how we may be able to make smallholders significantly better off by introducing new profitable crops and livestock products. More often than not, agriculture does not provide ample employment opportunities, largely due to land constraints on production expansion. One solution is to develop nonfarm sectors so as to provide more lucrative employment opportunities, in which working members of farm households increasingly find jobs. The chapter demonstrates the critical importance of increasing nonfarm income to improve the income of rural households and examines the roles of infrastructure and human capital in raising nonfarm income.
Show more [+] Less [-]The Ministry of Agriculture and Rural Development incorporated more A4NH evidence in implementation of nutrition-sensitive agriculture approaches in Viet Nam as part of their National Action Plan for Zero Hunger
2021
CGIAR Research Program on Agriculture for Nutrition and Health
In 2021, the Ministry of Agriculture and Rural Development started implementing A4NH-informed nutrition-sensitive agriculture approaches in 11 provinces as part of their Zero Hunger initiative.
Show more [+] Less [-]The Ministry of Agriculture and Rural Development incorporated A4NH evidence in implementation of nutrition-sensitive agriculture approaches in Viet Nam as part of their National Action Plan for Zero Hunger
2021
CGIAR Research Program on Agriculture for Nutrition and Health
The Ministry of Agriculture and Rural Development (MARD) implemented A4NH-informed nutrition-sensitive agriculture approaches in 11 provinces in Viet Nam as part of their Zero Hunger initiative. The food systems framework, developed by A4NH researchers, was included in the training materials for provincial staff. In addition, A4NH-informed training materials were approved by MARD as key resources for implementation. These contributions were possible because the A4NH Country Coordinator is an invited member of the Zero Hunger technical group and approval committees.
Show more [+] Less [-]Gender, household behavior, and rural development
2021
Doss, Cheryl | Quisumbing, Agnes R.
Our understanding of decision-making within rural households has changed substantially since interest in intrahousehold decision-making emerged in the 1980s. Conventional wisdom, rooted in the unitary theory of the household, held that households are groups of individuals who have the same preferences and fully pool their resources (Becker 1981). Accumulating empirical evidence has shifted this concept of the household in which households decide “as one” to a “collective” model in which individual household members may have different preferences, may not completely pool resources, and may bargain over outcomes in both production and consumption (Haddad, Hoddinott, and Alderman 1997).
Show more [+] Less [-]Shifting Chinese diets for a win-win of health and the environment
2021
Sheng, Fangfang; Gao, Haixiu; Fan, Shenggen; Chen, Kevin Z.; Zhang, Yumei; Zhu, Chen; Zhao, Qiran | http://orcid.org/0000-0001-7927-4132 Chen, Kevin; http://orcid.org/0000-0002-2658-4863 Fan, Shenggen
With rapid improvements in agricultural productivity and residents’ income, China has made remarkable advances in reducing hunger and malnutrition, as well as quality improvements in residents’ diets, witnessed by the progressively increasing consumption of fruits, eggs, aquatic products, and milk. However, new health and environmental challenges also arise alongside China’s dietary transition. Specifically, overweight and obesity have become increasingly prominent, and the incidence of diet-related chronic diseases has been on the rise. Among all these trends, the significant increase in meat consumption not only led to nutrition and health challenges, but also imposed intense pressure on resources and the environment. There are significant gaps between the current diet of Chinese residents and the recommended diets of the Chinese Dietary Guidelines and the EATLancet Commission. The current Chinese diet is mainly composed of grains, dominated by refined rice and noodles, insufficient coarse food grains, excessive meat, and insufficient consumption of whole grains, fruits, legumes, and milk. Incidence and mortality from diet-related chronic diseases in China would be significantly reduced if the “healthy diet” recommendations of the Chinese Dietary Guidelines, EAT-Lancet, Mediterranean and flexitarian (or low meat) diets were adopted. Deaths in China would be reduced by 1.15 million by 2030 if the population were following the Chinese Dietary Guidelines, or 1.8 million by shifting to the EAT-Lancet diet. At the same time, such a shift would significantly lower greenhouse gas emissions. Simulation results show that greenhouse gas emissions from agricultural activities would be reduced by 146-202 million metric tons if residents adopted one of the healthy diets, and by 60-116 million metric tons compared with food consumption at the 2020 level. The flexitarian diet would reduce greenhouse gas emissions the most. | Non-PR | IFPRI4; 3 Building Inclusive and Efficient Markets, Trade Systems, and Food Industry; DCA | DSGD
Show more [+] Less [-]Transforming agrifood systems to achieve China’s 2060 carbon neutrality goal
2021
Zhang, Yumei; Fan, Shenggen; Chen, Kevin Z.; Feng, Xiaolong; Zhang, Xiangyang; Bai, Zhaohai; Wang, Xiaoxi | http://orcid.org/0000-0001-7927-4132 Chen, Kevin; http://orcid.org/0000-0002-2658-4863 Fan, Shenggen
During recent decades, agriculture has developed rapidly in China, ensuring food security and enriching residents’ diets. At the same time, greenhouse gas (GHG) emissions from the country’s agrifood systems have increased by only 16 percent in the past two decades and fell for two consecutive years in 2017 and 2018. The proportion of GHG emissions in the country’s food systems to the total GHG emissions dropped from 18.7 percent in 1997 to 8.2 percent in 2018. GHG emissions from the Chinese agrifood systems should not be ignored, neverthless. In 2018, GHG emissions from agrifood systems was still as high as 1.09 billion tons CO2eq1. While ensuring food security as the national top priority, measures such as improving agricultural technologies, reducing food loss and waste, and shifting dietary patterns must be adopted to reduce GHG emissions from agrifood systems. Improvements in agricultural technologies are the most effective standalone measures, but the combined three measures above have the most significant effect on GHG emission reduction. Projections show that the combined three measures can redcue GHG emissions by 47 percent in 2060 from the 2020 level. Land use, land use change, and forestry (LULUCF) play a key role as a carbon sink. The carbon sequestration from LULUCF was around 1.1 billion tons CO2eq in 2014. It can increase to 1.6 billion tons of CO2eq per year in 2060, thus LULUCF could completely offset GHG emissions from agrifood systems and still have a surplus capacity to sequester nearly 1 billion additional tons of CO2eq per year, well above the current level of net sequestration,contributing to overall carbon neutrality of China. | Non-PR | IFPRI4; 3 Building Inclusive and Efficient Markets, Trade Systems, and Food Industry; DCA | DSGD
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