摘要
以4年生直播密植骏枣树为材料,研究了不同钾肥施肥量对密植红枣植株中钾素分配动态变化的影响。结果表明,花期、坐果期、果实成熟期的土壤中的速效钾含量较接近,变化趋势大致相同,且在T3处理(45 kg/667m2)达到最高值。整个生育期内,叶片、枣吊中的钾含量多余其他各个器官,且变化幅度较大。展叶前,钾肥施用量与红枣根系含钾量呈指数关系,相关方程为y=0.1206 x0.0611(r=0.9716**);花期、坐果期、果实成熟期,钾肥用量与红枣枣头枝中钾含量达显著的直线相关关系,相关方程分别为y=0.1533 x+0.1077(r=0.9895**)、y=0.0220 x+0.2450(r=0.9410*)、y=0.0694 x+0.4478(r=0.9567**)。
Abstract： In this paper, taken 4-year jujube plant as tested materials, the effects of different potassium fertilizer levels on dynamics of potas- sium distribution of Chinese jujube plant were studied in field experiment. The results showed that at flowering stage, fruit sot stage and fruit maturity stage of jujube, soil K contents were closor, which had a same trend roughly, and the K content reached the highest value in T3 treatment （ 45 kg/667m2 ）. In the whole growth period, the potassium contents of leaf and dates hanging were more than that of other organs, and the range of their changes were big. Before leaf expansion, the potassium fertilization with K content of dates root had exponential correlation, and fitting equation was y =0. 1206 x0.0611 （ r =0.9716 ＊ ＊ ）. At flowering stage, fruit set stage and fruit maturity stage of jujube, there were linear correlations, and fitting equations were y =0. 1533 x ＋ 0. 1077 （r = 0.9895 ＊ ＊ ）, y = 0.0220 x ＋0.2450 （r = 0. 9410＊） andy = 0.0694 x ＋0.4478（r = 0.9567＊＊）, respectively.
出处
《西南农业学报》
CSCD
北大核心
2014年第4期1591-1595,共5页
Southwest China Journal of Agricultural Sciences
基金
国家科技支撑计划项目((2013BAD14B0305))
兵团农业类产学研重大专项(2010ZX02)
兵团重大科技项目(2013AA001-1)
塔里木大学创新群体研究项目(TDZKCX1001)
农一师科技推广项目(2011ZB02
2011YY03)
关键词
钾肥
红枣
钾素分配
动态变化
Chinese jujub
Potassium distribution
Dynamics
Potassium fertilizer
