Used three single factor trials which are different cutting frequency, fertilizer condition and plant density, by the mensuration of fresh grass yield, dry grass yield and the number of branches to found the planting technology of Stylosanthes Guianensis cv.

Used three single factor trials which are different cutting frequency, fertilizer condition and plant density, Mensurate fresh grass yield, dry grass yield and the number of tillers for found the planting technology of Pennisrtum purpureumxp typhoidevm cv.

The quality of root,diameter of main root,the number and size of nodule of Lespedeza bicolar decrease with the increasing of cutting frequency;soluble sugar content of root decrease with the increasing of cutting frequency.

Based on potted plant test,the effects of different cutting frequency treatments on overground biomass and root system of Ceratoides lanata(Pursh) Howell were studied.

The thesis researches that different cutting frequency of wild Lespedeze bicolor in North China Area has effect on different root system growth and root system soluble sugar.

Influence of Mowing Frequency and Stubble Height to Productivity in Artificial Lawn;

The results showed that there was significant negative correlation between the aboveground energy standing crops of community and mowing frequency.

Study on sweet potato vine cutting ratio and interval;

Effect of Cutting and Harvest Time on the Yield of Inulin in Chicory Root;

Effects of cutting on the population dynamics of main insect pests on alfalfa;

Cutting Effects on Coverage of White Clover and Weeds;

Effects of Defoliation on Tiller Turnover in Festulolium and Smooth Bromegrass;

Effect of defoliation on photosynthetic characteristics of Stylosanthes guianenesis cv. Reyan No.13