缺磷对茶树幼苗养分吸收的影响  

Effects of Phosphorus Deficiency on Nutrient Absorption of Young Tea Bushes

作　　者：林郑和[1,2,3] 陈立松[1,2] 陈荣冰[3] 彭艾[2] 

机构地区：[1]福建农林大学园艺学院,福建福州350002 [2]福建农林大学园艺植物生理生化与分子生物学研究所,福建福州350002 [3]福建省农业科学院茶叶研究所,福建福安355000

出　　处：《茶叶科学》2009年第4期295-300,共6页Journal of Tea Science

基　　金：农业部(福安)茶树种质资源野外科学观测站;国家科技支撑计划项目(2007BAD07B02)

摘　　要：每周3次用含0、40、80、160、400、1000μmol/L磷(P)的营养液浇沙培10月龄扦插"黄观音"茶[Camellia sinensis(L.)O.Kuntze]苗17周。随供P浓度的增加,茶树根P含量呈线性增加,但茎和叶P含量呈曲线增加;在所有供P处理中,根P含量最高,其次是叶P含量,茎P含量最低,高供P处理的植株尤为明显。缺P降低茶树根茎叶K含量,但对根茎叶Ca含量影响不大。缺P降低根Mg含量,增加茎的Mg含量,但对叶Mg含量影响较小。不供P叶有稍高的C含量,较低的N含量和较高的C/N比;供P对根和茎C和N含量及C/N比影响较小。总之,缺P不仅影响茶树根茎叶营养元素的含量,也改变其在根茎叶之间的分配。Vegetative propagated 10-month-old tea [Camellia sinensis （L.） O. Kuntze cv. Huangguanyin] plants grown in pots containing sand were fertilized three times weekly for 17 weeks with nutrient solution at a phosphorus （P） concentration of 0, 40, 80, 1 60, 400 or 1 000 μmol/L. As P supply increased, root P content increased linearly, while stem and leaf P content increased in a curve shape. Over the range of P supply, the sequence of P content in the three organs is root P content 〉 leaf P content 〉 stem P content, especially in high P-treated plants. P deficiency decreased the P contents in roots, stems and leaves, but had little effects on the Ca content of roots, stems and leaves. P deficiency decreased root Mg content and increased stem Mg content, but showed insignificant effects on leaf Mg content. Leaves from P-deficient （0 μmol/L P） plants had slightly higher C content, lower N content and higher C/N ratio, whereas P supply had little effects on the contents of C and N and the ratio of C to N in roots and stems. In conclusion, P deficiency not only affects contents of nutrient elements in tea roots, stems and leaves, but also altered distribution of nutrient elements among roots, stems and leaves.

关 键 词：磷(P) 营养元素 茶[Camellia sinensis(L.)O.Kuntze] 

分 类 号：S571.1[农业科学—茶叶生产加工] S143.43[农业科学—作物学]