nutrient enrichment
2.Clay enrichment and nutrient enrichment occurred in sediment,but the enrichment ratio was different: Clay was 1.23 in watermelon land and 1.20 in rape land,total nitrogen and rapidly available phosphorus was higher than 1.3,and total phosphorus and hydrolysable nitrogen was 1.1~1.3.
3.The results showed that During the experiment, add lower concentrations of mixed rare earth (0.10mg/L,0.20mg/L,0.40mg/L) to promote growth and experimentation red duckweed nutrient over-enrichment of water bodies However, with further concentration rise (0.80mg/L), Duihong duckweed growth of nutrient over-enrichment of water bodies and experiments have struck.
4.The effects and mechanisms of atmospheric CO2 enrichment and temperature rise on water and nutrient use in wheat were studied in this thesis using the chamber pot experiment and open top experiment.
