Compost(堆肥) Compost is an organic fertilizer and soil amendment produced from organic wastes by micro-biological decomposition Composting reduces bulk, eliminates some unpleasant odors气味, and kills weed seeds and disease organisms if the composting process generates high enough temperatures Improve the fertilizer value But allows gaseous N losses and leaching of other nutrients
Compost（堆肥） ▪ Compost is an organic fertilizer and soil amendment produced from organic wastes by micro-biological decomposition. ▪ Composting reduces bulk, eliminates some unpleasant odors气味, and kills weed seeds and disease organisms if the composting process generates high enough temperatures. ▪ Improve the fertilizer value ▪ But allows gaseous N losses and leaching of other nutrients
Compost techniques Heap 3
Compost techniques ▪ Heap
Main functions Composting has two main functions: to provide farmers with organic fertilizer, and to recycle organic wastes It changes organic wastes, which would otherwise pollute the earth, into a valuable substance
Main functions ▪ Composting has two main functions: to provide farmers with organic fertilizer, and to recycle organic wastes. ▪ It changes organic wastes, which would otherwise pollute the earth, into a valuable substance
Main functions Composting is also materials left over from agricultural production and a way or process to transform the waste into a useful resource Composting may improve the fertilizer value by lowering the ratio of carbon to N, s and p The recycling of agricultural wastes and by products by composting is an important part of sustainable agriculture. It is particularly important in Asia, where agriculture is intensive and farms are small
▪ Composting is also materials left over from agricultural production and a way or process to transform the waste into a useful resource. ▪ Composting may improve the fertilizer value by lowering the ratio of carbon to N, S and P. ▪ The recycling of agricultural wastes and byproducts by composting is an important part of sustainable agriculture. It is particularly important in Asia, where agriculture is intensive and farms are small. Main functions
Benefits of compost 1. Mature compost is an excellent organic fertilizer and soil amendment 2. There is less danger of over-fertilization by adding decomposed organic material to a garden 3. It provides a slow release of nutrients as micro-organisms in the soil break the organic material down into an inorganic, water soluble form which the plants can use
Benefits of compost ▪ 1.Mature compost is an excellent organic fertilizer and soil amendment. ▪ 2.There is less danger of over-fertilization by adding decomposed organic material to a garden. ▪ 3. It provides a slow release of nutrients as micro-organisms in the soil break the organic material down into an inorganic, water soluble form which the plants can use