Effects of Water and Nitrogen Coupling on Yield and Quality of King Grass
By using the method of pot culture experiment, the effect of growth and the mechanism of physiological response of king grass under different water and nitrogen conditions was studied, to provide the reference about the rational using of water and nitrogen in planting king grass. The results showed that during the soil moisture conditions of W1 (35％-45％), W2 (55％-65％) and W3 (75％-85％) ,the applica-tion rate of nitrogen of corresponding maximum yield were 271.78 , 355.05 and 329.06 kg/hm2 , and application rate of nitrogen of the highest protein content were 361.54, 505.44, 647.88 kg/hm2 . With the deepening of water stress, the accumulation of proline increased, and it in-creased when application rate of nitrogen increased in the same moisture conditions. CAT enzyme was as water stress intensified that significant-ly reduced, and it increased when application rate of nitrogen increased in the same moisture conditions. The effect of soil moisture conditions on yield and quality of king grass was higher than application rate of nitrogen, and they existed obviously synergy effect, so only if collocation of water and nitrogen was proper, higher yield and quality could be obtain. In this experiment condition, the best conditions of water and nitro-gen were that the content of soil moisture was during 75％-85％ of field capacity,and the application rate of nitrogen was 329.06 kg/hm2 ,the yield and quality of king grass could be significantly improved in this ratio .
Coupling of water and nitrogenKing grassGrowth performanceProlineCatalase
万方数据
维普
