摘要
采用田间定位观测,探讨了砖窑沟流域土壤贮水供水基本性质、糜子耗水规律与水分供需平衡及其调节措施。结果表明,当地土壤具有较好的蓄水供水功能。糜子耗水量随产量提高而增加,亩产115kg 的耗水量为254mm,亩产233kg 的耗水量为301mm,其中苗期耗水约占10%,分蘖期约21%,拔节期35%,抽穗成熟期为34%左右。总降水能满足糜子耗水要求,土壤供水起到年度及阶段调节作用。增加肥料投入,合理耕作,适当调整播期与密度是合理调节利用土壤水分,提高作物产量与水分利用效率的有效措施。
The present paper dealth with the basical characters of soil water storage and supply,the rule of millet water consumption,the balance of water supply and need,and water regulative measure in Zhuanyaogou Basin based on the field observation of fixed site.The results showed that the soil in that place have superiority in storing and supplying water;The water conusmption amount of millet increase with the yield's raising,for example,water consumption were 254 mm with yield 115kg per mu and 301mm with 233kg,among which water consumption amount took 10% at the seedling stage,21% at the stooling stage,35% at the shooting period and 34% at the heading period;total amount of precipi- tation could catch the needs of millet consumption and water suplly of soil functioned as year or stage adiustment.It is a effective measure for adiusting and utilizing soil water resonablly,raising crop yield and utilizing efficiency of water that increase fertilizer,till reasonablly and adjust planting stage and density properly.
出处
《山西农业科学》
1993年第1期44-47,共4页
Journal of Shanxi Agricultural Sciences
关键词
糜子
耗水规律
水分
Consumption rule
Water balance
Water productivity
Millet
