Abstract:

In order to study the application effect of Poa pratensis L. conservation fertilizer, 4 years old Poa pratensis L. as the test materials and set four treatment as nitrogen, with nitrogen and phosphorus, with NPK, organic nitrogen and all treatments amount of nitrogen were 91.09 kg/hm2, one control and three times repeated. The results showed that: the chlorophyll-a content to be improved best with nitrogen and phosphorus treatment that increased 33.33% than control but organic nitrogen treatment reduce 2.33% in July; with NP treatment significantly increased chlorophyll b content that increased 48.08% than control and NPK treatment increased 46.15% in September; nitrogen and phosphorus treatment could significantly improved carotenoid content in July and September and then increased 33.33% than control but nitrogen treatment only increased 2.38% in October; The nitrogen and phosphorus treatment leaf length Significantly higher than the control in June to October, organic nitrogen treatment was no significant difference with the control. Comprehensive analysis that nitrogen and phosphorus treatment effects the best and organic nitrogen the worst.