The Technology And Model Research Of Pig Manure Security Using Based On The Rice And Wheat Rotation

In recent years,China's rapid development of aquaculture waste pollutants generated by the serious impact to ecological environment,become important factors limit the breeding healthy development.The rational use of livestock and poultry dung and disposal for solving the pollution of livestock farming,is of great significance to guarantee the healthy development of livestock and poultry breeding.Through field experiment,this study selects the pig pig in rice-wheat rotation system for material research on rice and wheat yield,the effect of combination of nitrogen and phosphorus in cropping system balance analysis,to explore experiment under the condition of farmland system given the safety of the pig.Test set five different levels of pig processing: 0 kg/ 667m~2,334 kg /667 m~2 and 556 kg /667 m~2and778 kg / 667 m~2 and 1001 kg / 667 m~2,the results showed that the:(1)Pig manure seems obvious effect on crop yield.Rice yield in pig seems to 778 kg /667 m~2highest;Pig when applying the highest content,the output of rice has decreased,not pig minimum,two season rice yield and applying pig content performance appear similar patterns.Wheat yield when applying pig content of 778 kg / 778 m~2 is highest,pig seems 1001 kg / 667 m~2 wheat yield no ascension,do not use pig wheat production minimum 314.91 kg /667 m~2.(2)The pig manure with different levels of nitrogen and phosphorus nutrient accumulation and nutrient of rice and wheat harvest index effect is obvious.Pig seems 778 kg/ 667 m~2 is the accumulation of nutrient uptake and harvest index.Two season rice,778 kg /778 m~2 treatment highest nitrogen absorption and harvest index;778 kg / 667 m~2 of wheat processing nitrogen absorption and harvest index law similar to rice.phosphorus accumulation and nutrient harvest index also have obvious difference,and a presentation like that of nitrogen.(3)The soil-crop systems of nitrogen and phosphorus nitrogen and phosphorus surplus balance analysis results show that different treatments have obvious difference.Both season rice in 1001 kg / 667 m~2 pig seems the amount of surplus nitrogen is the largest,the abundance of nitrogen rate were 61.37% and 72.42% respectively;2015 wheat nitrogen surplus quantity also in the 1001 kg / 667 m~2 pig seems the highest nitrogen surplus rate of up to 64.24%.P balance analysis results show that the different pig fertilization levels on phosphorus removalrate of surplus quantity and rich in effect obviously.In the 1001 kg / 667 m~2 seems,p amount of surplus,abound rates are the highest.(4)Based on the analysis on the balance of nitrogen and phosphorus pig safety surueyed.Pig manure seems to 334 kg / m~2,basic nitrogen balance;System p balance characteristic in the vicinity of 334 kg / 667 m~2,rice season is less than 334 kg / 334 m~2.Therefore,based on the pig anniversary of applying security content can be a rough estimate of 668 kg / 668 m~2.(5)Different applying pig content had significant effect on the accumulation and distribution of soil nutrients.Pig seems to increase,the top layer of soil total nitrogen accumulation,stubble soil total nitrogen accumulation is less than the rice season;Vertical distribution of soil total nitrogen showed a trend of decrease with depth,when applying the highest pig content,soil total nitrogen content increased significantly than control,vertical nitrogen leaching risk is bigger.Soil alkali-hydrolysable nitrogen content and the distribution is not obvious,numerical low correlation with pig manure fertilization level and applied in the risk characterization has no obvious correlation with the pig.Soil available p with pig accumulated seems to rise significantly.In pig seems up to 556 kg / 667 m~2 of soil available p has skyrocketed,has similar characteristics of vertical distribution shows that more than the vertical surueyed p leaching risk is bigger,especially under the condition of paddy planting p leaching nots allow to be ignored.(6)Economic results showed that 778 kg / 667 m~2 pig manure seems best,corresponding to the crop yield and output value are the largest.(7)Based on nitrogen balance pig raising combination mode of safe bearing capacity building: a restock for 1000 pigs of pig farms,to form a complete set of arable land is about60.15 hm~2.