A Study On The Relationship Between Land Environmental Bearing Capacity And Scale Of Pig-Farm Pig-Farm

The experiment:1.The average day feed intake and day excretion of 20 finishing pigs and 6 sows were recorded 2.Applying fertilizer for the orchard with 5 treatment groups:(1)CK(no fertilizer);(2) Applying well-rotted pig manure(4500kg/acre);(3) Applying well-rotted pig manure(3000kg/acre);(4) Applying well-rotted pig manure(1500kg/acre)+fertilizer (N 8kg/acre,P2O5 4kg/acre,K2O 8kg/acre);(5) Applying fertilizer(N 16kg/acre,K2O 16kg/ acre,P2O5 8kg/acre).3.5 treatment groups (1)CK(no fert ilizer);(2) Applying well-rotted pig manure(3000kg/acre); (3) Applying well-rotted pig manure(2000kg/acre);(4) Applying well-rotted pig manure(1000kg/acre) + fertilizer (N 5.5kg/acre,P2O5 2.5kg/acre,K2O 5.5kg/acre);(5)Applying fertilizer(N 11kg/acre,P2O5 5kg/acre,K2O 11kg/acre).4.8 treatment groups (1)CK(no fertilizer); (2)PK; (3)NP; (4)NK; (5)NPK; (6) 50F+50M(50% the same nutrient amount fertilizer of the (5) treatment group and 50% organic fertilizer);(7)30F+70M(30% the same nutrient amount fertilizer of the (5) treatment group and 70% organic fertilizer); (8)70F+30M (70% the same nutrient amount fertilizer of the (5) treatment group and 30% organic fertilizer).5.40 the same parity,healthy 15～20Kg Lean-pigs were choosed, and divided 5 treatment groups (8 pigs of every treatment)according to the same weight, in half respectively male and female,and raised 30 days.(1) antibiotics;(2) The organic calcium+antibiotics;(3) Polysaccharide containing compositions +antibiotics;(4) The organic calcium+ conjugated polysaccharide+ antibiotics,the dose by half;(5) The organic calcium+conjugated polysaccharide.The result:The method of applying rice paddy pig manure(1t/acre) and 50% fertilizer quarterly increased rice production significantly,and did not contribute to harmful heavy metal pollution on agricultural soils,the method is a safe technology.The method of applying rice paddy pig manure(2t/acre) quarterly contributed to harmful heavy metal (chrome, Cadmium)pollution on agricultural soils probablely.The method of applying rice paddy pig manure(3t/acre) quarterly contributed to harmful heavy metal (copper,chrome, Cadmium, zinc)pollution on agricultural soils significantly.The method of applying orchard pig manure (1t/acre) and 50% fertilizer quarterly increased production significantly, and did not contribute to harmful heavy metal pollution on orchard, the method is a safe technology.The method of applying orchard pig manure(3t/acre) quarterly contributed to harmful heavy metal (chrome, Cadmium)pollution on orchard soils probablely.The method of applying orchard pig manure(4.5t/acre) quarterly contributed to harmful heavy metal (copper,chrome, Cadmium, zinc)pollution on orchard soils significantly.The result showed that the applying rice paddy pig manure(