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水分是农作物生活四大要素之一。农作物生长所需的水分,是靠根群从土壤中吸取的。对于旱地作物来说,土壤含水过少或过多,都会使作物生长不良甚至死亡;只有土壤水分供应适宜,作物才能生长良好,从而获得高额产量。因此掌握土壤水分的变化规律,避免不利水分条件的影响,并合理地利用水分条件,是旱生作物获得稳产增收的重要途径。自1956年以来,我区各专区农业气象试验站和部分气象站,就陆续进行系统的旱地
Water is one of the four elements of crop life. The water needed for crop growth is extracted from the soil by the root mass. For dryland crops, too little or too much water in the soil can lead to poor crop growth or even death. Crops can grow well and yield high yields, provided that soil moisture supplies are adequate. Therefore, grasping the variation law of soil moisture, avoiding the influence of unfavorable water conditions and using water conditions rationally are important ways to increase the yield of dry crops steadily. Since 1956, agricultural meteorological test stations and some weather stations in various districts of our region have been carrying out systematic dryland