植物营养与肥料学报2012，Vol.18Issue(1)：241-248,8.
施用氮磷钾对密植梨枣生长与叶片养分季节动态的影响
Effects of fertilization on growth and seasonal dynamic of leaf nutrients of close planting pear-jujube trees
摘要
Abstract
To investigate the influence of different fertilization on jujube nutrients, field experiments were conducted in loess hilly-gully mountains, and pear-jujube （Zizyphus jujuba Mill. cv. Lizao） was used as experimental materi- als. The plant development, productivity and fruit quality of pear-jujube in different fertilizer application conditions were studied, and the seasonal dynamic changes of eight kinds of nutrition elements （ N, P, K, Ca, Mn, Zn and Fe） of pear-jujube leaves were also examined. The results show that N fertilizer can increase the growth of the new bran- ches and the jujube enlargement. P fertilizer can improve fruit yield to 33210 kg/ha; K fertilizer can improve fruit quality. Therefore, P and K fertilizer cooperating application can increase both yield and quality of the pear-jujube. The results show that the contents of N, P and K of the pear-jujube at the blossom and fruit-set period （from early May to early July） are in higher levels, compared with Mg, Fe, Mn and Zn. Besides, the contents of N and P in leaves are relatively stable at the fruit enlargement period （from middle July to late August） ; at the same time, K is declined drastically, while trace elements （Fe, Mn and Zn） llave rising trends. At the fruit maturation stage （from early September to early October）, the contents of N, P and K in leaves are decreased, whereas Fe, Mn and Zn are increased slowly or remained basically unchanged. So we conclude that there are positive correlations between N, P, K and Mn and between Ca, Mg, Fe and Zn in leaves of jujube in the growth period. Furthermore the contents of N,P and K have significantly positive correlations, however, the content of N, P and K correlate negatively to Ca, Mg, Fe and Zn in jujube leaves.关键词
梨枣/叶片营养/施肥/矿质元素Key words
pear-jujube tree/leaf nutrient/fertilization/mineral element分类
农业科技引用本文复制引用
张彤彤,徐福利,汪有科,林云..施用氮磷钾对密植梨枣生长与叶片养分季节动态的影响[J].植物营养与肥料学报,2012,18(1):241-248,8.基金项目
"十二五"国家科技支撑计划(2011BAD29804) （2011BAD29804）
陕西省科技创新工程(2011KTCL02-02)资助. （2011KTCL02-02）
