Effect of nitrogen and phosphorus fertilizer on biological characteristics and quality of Leymus chinensis in Yulin sandy land
CAI Ying-ying
GUO Wei
SHI Lei
XU Wei-zhou
HUANG Yuan-ping
KANG Fu-ren
BU Yao-jun
Abstract：The study was to explore the effect of different nitrogen(N)and phosphorus(P)levels on biological characteristics and quality of Leymus chinensis.The experiment was conducted in a randomized block design.There were 10 treatment groups with three nitrogen application levels and three phosphorus application levels,N1,N2 and N3 were treated with nitrogen fertilizer 120,180 and 240 kg/hm2,respectively.P1,P2,and P3 were treated with 60,90 and 120 kg/hm2 phosphorus fertilizer,respectively.N1P1,N1P2 and N1P3 were treated with N and P combined application,and CK was not treated with fertilizer.Each treatment was repeated three times.The results showed that plant height of Leymus chinensis in N1P3 was significantly higher than that in all treatments except N2,N3 and N1P2(P＜0.05).N1P2 Leymus chinensis had the highest hay yield.Leaf length of Leymus chinensis in N1P3 was significantly higher than that in CK,P1 and N1P1 treatments(P＜0.05).The leaf width of N3 was significantly higher than that of other treatments(P＜0.05).The leaf number of Leymus chinensis in N1P3 was significantly higher than that in all treatments except N1 and N2(P＜0.05).The crude protein content of N3 was significantly higher than that of other treatments except N2(P＜0.05).Crude fat content of N3 was significantly higher than that of all treatments except N1,N1P1,N1P2 and N1P3(P＜0.05).Fertilizer application could reduce crude ash content of Leymus chinensis.The crude fiber content of Leymus chinensis in CK treatment was the highest(P＜0.05).The content of acid detergent fiber in N1 treatment was the lowest(P＜0.05),which was 34.28%.Fertilization could reduce the content of neutral detergent fiber in Leymus chinensis.The relative feeding value of Leymus chinensis in N1P2 was significantly higher than that in the other treatment groups except N1 and N1P1(P＜0.05).The experiment indicates that fertilization can improve the growth traits and quality of Leymus chinensis,and the appropriate combined N and P application rates are 120,120 kg/hm2,respectively.
Keywords：Leymus chinensisYulin sandy landcombined application of nitrogen and phosphorusnutritional quality
Publication Date：2023-08-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 97-101 )