摘要
对嫁接西瓜和自根西瓜生长动态、根系伤流量及伤流液中营养元素含量进行了研究，结果表明：嫁接西瓜根系发育早，生长速度快，根冠比（Ｒ／Ｔ）高，根系伤流量显著增加，伤流液中ＮＯ_３－Ｎ，Ｐ，Ｃａ，Ｍｇ，Ｓ含量显著高于自根西瓜，特别是ＮＯ_３－Ｎ，伸蔓期和开花期分别比自根植株高１０５．０％和９３．７％。而伤流液中ＮＨ_４－Ｎ和Ｋ含量低于自根植株。表明嫁接西瓜具有不同于自根西瓜的营养吸收特性，施肥中应有别于自根植株。
Growth trends, yield of xylem exudate and mineral concentrations in the exudatewere investigated in comparison of grafted watermelon plants [Scion: Citrullus lanatus (Th. )M. cv .Xinchen; Rootstock: Lagenaria leucantha Rushy. cv. Nanzheng No. 1 ] and own - rootwatermelon plants. The results showed that the grafted plants developed root earlier and faster.Its ratio of R/T were higher, and yield of xylem exudata increased significantly. In the graftedplants, concentrations of N O3 - N, P, Ca, M g, S in xylem exudate were higher, especiallyN O3 - N, were 105. 0 % and 93. 7% higher at sprouting stage and flowering stage repectivelythan that in the own - root plants. But the concentrations of NH4+ - N and K were lower in thegrafted plants. This result indicated the grafted watermelon plants had different properities ofmineral absorption from the own - root watermelon plant. And fertilization should be different.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1999年第3期38-41,共4页
Journal of Hebei Agricultural University
基金
河北省教委博士基金
省科委资助!96220913D
