Nitrogen Cycling And Balance In The Farmer Household's Agro-Animal Husbandry Ecosystem Of Yaozhou Region, Shaanxi Province

According to the investigate of farmer household and the experiment of goat breeding,combine correlation of data literature, analyze and evaluate on nitrogen cycling and balance status in the farmer household's agro-animal husbandry ecosystem of Yaozhou, the result indicate:1.The difference was clearly for as much as the difference types nitrogen of farmer's plough into,output and using status.The pure planting of farmer household crop output and cropland system inner nitrogen depend on fertilizer, result in the soil organic nitrogen to the bad severity. The agro-animal combine of farmer household cropland ecosystem organic fertilizer dosage reach on 210.18 kg/(hm~2.a), nitrogen cycling and balance go fine, but being the problem of nitrogen plough into assonant.And that agro-animal combine of farmer household's cropland's nitrogen surplus ratio was 66.04%, being the obvious problem of high plough into but low yield.2.The small scale farmer household's planting sub-system output surplus was 21.25 kg; the goat's manure nitrogen was 69.31 kg, make sure ensure the crop's growth, system inner nitrogen cycling slightly have surplus.Nitrogen for homeostasis of between the medium scale representative farmer household's planting sub-system and breed sub-system; the cropland storeroom's nitrogen surplus was 56.03 kg, the nitrogen surplus ratio in order; the organic nitrogen recycling quotienty was 0.65, the good nutrient cycling quotiety was 0.57,the nitrogen cycling was balanceable and benign.The great scale representative farmer household's crop output can't satisfied the need of feedstuff's nitrogen for goat produce, the overall margin was 93.80 kg; the goat's manurer nitrogen was 277.32 kg, the organic nitrogen recycling quotiety was 0.95, the cropland storeroom's nitrogen surplus is 44.73%,so should reduce the nitrogenous fertilizer dosage.3.After the framework fine-tune of three scale representative farmer,the crop productional cost plough into average falled 28.99%,the net income average increased 13.50%; the medium and small scale representative farmer household depasture goat had no use for buy feedstuff, cost plough into was very low, and heighten the production value, output-input ratiowas about 3.70.For the whole system,After the framework fine-tune productional cost plough into average heighten 49.80%,the net income average increased...