Effect of Corn Cob-based Water Retention Agent on Diurnal Photosynthetic Characteristics of Medicago Sativa L
To explore the effects of water retention agents on the water absorption and holding capacity of sandy soil and the diurnal variation characteristics of photosynthetic growth of Medicago sativa L,the corn cob-based water retention agent developed by our research group and 2-year-old alfalfa were used as experimental materials.The combination of potted artificial water supply and natural water consumption was used,and four water retention agents treatments A,B,C,and D were designed(0,0.2,0.4,and 0.8 g of water retention agents were added to 100 g of soil,respectively).The experiment was conducted in the branch stage and bud stage of Medicago sativa L,which were the most sensitive to soil moisture.The results showed that compared with treatment A,different additive treatments could improve the soil water holding capacity,and it could effectively alleviate the photosynthetic"lunch break phenomenon"of Medicago sativa L.During the experimental period,the relative soil moisture content of treatment C remained between 45.27%and 70.67%.Compared with treatment A,Medicago sativa L biomass of treatment C increased by 71.81%.It indicates that when the amount of corn cob-based water retention agent is 0.4%of soil weight,Medicago sativa L has the best effect of improving photosynthetic characteristics.
super-absorbent polymerMedicago sativa Ldiurnal variation of photosynthesissoil water holding capacity
万方数据
维普
