Study on grass yield,quality,and stem moisture of Triticosecale wittmack in northwest Henan region
YUE Jingzhi
SUN Miping
BIAN Jingjing
ZHANG Chunrong
CHEN Li
DU Wenhua
ZHANG Yueling
LI Bing
Abstract：The experiment aimed to investigate the dynamic change in forage yield and nutritional quality of Triticosecale wittmack at different growth stages in the northwest Henan region,and analyze the regulatory effect of stem moisture content(MST)on fiber metabolism and feeding value.Two Triticosecale wittmack varieties,Gannong 2(GN2)and Shida 1(SD1)were selected,and arranged in a split-plot design.The main plots were varieties(GN2 and SD1),while the subplots were four cutting stages:Jointing stage(JT),heading stage(HD),flowering stage(FL),and milk-ripe stage(MS).Each stage had three replicates,resulting in a total of 24 plots.Forage yield,nutritional quality,and changes in MST were determined at each growth stage.The results showed that there were significant differences in forage yield of Triticosecale wittmack in different growth stages.The fresh grass yield reached a peak at HD(107.08 t/hm2),which was significantly higher than JT(59.65 t/hm2)and MS(60.70 t/hm2)(P＜0.05).The hay yield continued to increase with the growth period,with MS reaching its highest level(31.20 t/hm2),which was 33.50％higher than HD.The MST content decreased from 78.29％in JT to 48.42％in MS.MST content is negatively correlated with neutral detergent fiber and acidic detergent fiber content,and positively correlated with crude protein content and relative feed value.GN2 mainly synergistically improves grass yield and quality by increasing tiller number,while SD1 mainly relies on plant height and stem strength to achieve high yield.The study shows that HD is a key window for yield formation and lodging risk,while MST is a core indicator for regulating fiber deposition and nutritional quality.GN2 under HD cutting and SDl under MS cutting can achieve a synergistic improvement in both yield and quality.
Keywords：Triticosecale wittmackgrowth stagesyield-quality dynamicsstem moisturelodging risk
Publication Date：2025-08-28
Online Publishing Date：2025-10-28(First online date of this platform, not the publication date of the document)
Pages：6( 115-120 )