三、水分水是一切作物正常生长发育过程必不可少的条件之一。“有收无收在于水,收多收少在于肥”这两句农谚,就是水分条件与农业收成关系方面的总结。作物的生理活动,包括光合作用、蒸腾作用、根系吸收作用和养分的运输等等,均需有充足的水分供应才行。各种农作物从播种出苗到结出 Third, water is one of the essential conditions for the normal growth and development of all crops. “There is income confiscated in the water, income and more income is less than fat,” these two agricultural proverbs, is the conclusion of the relationship between water conditions and agricultural harvests. Physiological activities of crops, including photosynthesis, transpiration, root absorption and nutrient transport, require sufficient supply of water. A variety of crops from sowing to seed out