Effects of Potassium Nitrate Combined with Organic Fertilizer on Growth and Nutrient Uptake of Poa pratensis L.
The kentucky bluegrass lawn will be significantly degraded after being planted on saline alkali soil for 3-4 years,it is important to study the use of potassium nitrate with organic fertilizer to provide nutrition in landscape maintenance to promote plant growth and improve the quality of lawn.The test is set in the urban green belt,it was set 4 treatments of control(K1),potassium nitrate fertilizer(K2),chemical fertilizer+fermented cake fertilizer(K3),chemical fertilizer+humic acid compound fertilizer(K4),each treatment was replicated 3 times,and the changes in growth and nutrient uptake in bluegrass were studied.The results showed that:the dry matter accumulation,water content,chlorophyll a,chlorophyll b and carotenoid content of Poa pratensis L.in K3 treatment was higher than K1 from July to October,and the plant nitrogen,phosphorus and potassium uptake was significantly increased;the dry matter accumulation of K3 was significantly higher than K2 in August and September,chlorophyll b and carotenoid content were significantly increased in July and October,the nutrient uptake of nitrogen,phosphorus and potassium was increased from August to October;K3 compared with K4,the dry matter accumulation from July to September was increased,chlorophyll b and carotenoid content from July to October was significantly increased,and the uptake of nitrogen,phosphorus and potassium nutrients was promoted.Comprehensive analysis concluded that potassium nitrate with fermented cake fertilizer was the appropriate fertilization treatment.
万方数据
维普
