摘要
本文在新疆塔里木农场盐渍地上进行长绒棉施种肥试验,旨在研究种肥和土壤盐分对出苗的影响,结果表明,尿素态N与表层碱解N呈正相关(r=0.5638),是影响出苗的重要因素,土壤Cl^-与出苗率也有较高的负相关(r=-0.4116),同样严重影响出苗,尿素态N与重过磷酸钙、P_2O_5分别控制在60kg/ha和105kg/ha对出苗无不良影响。
In order to study the influence of seed manure and salt in soil upon the rate of long stample, the experiment of fertilized seed manure of sea-island cotton was carried out in salty soil on Tarim Farm. The result indicated that urea-N correlating directly with alkaline hydrolysis nitrogen in the surface layer of the soil (r=0.5638) seriously impairs seedling. Meanwhile, the contents of Cl^- in the soil correlates oppositely with the rate of long stample cotton (r=0.4116), so it is main factor to impair seedling. Using less than 60kg/ha of urea-N and about 105kg/ha of double superphosphate—P_2O_5 has no effect on the rate of long stample cotton.
关键词
棉花
出苗率
盐渍土
施肥
种肥
sea-island cotton
alkaline hydrolysis nitrogen urea-N double
superphosphate
rate of long stample cotton
seed manure
