Wheat response to differences in water and nutritional status between zeoponic and hydroponic growth systems.
Wheat response to differences in water and nutritional status between zeoponic and hydroponic growth systems.
复制标题
小麦对非水培和水培生长系统之间水和营养状况差异的反应。
DOI：
10.2134/agronj2000.922353x
复制
发表时间：
2000
期刊：
影响因子：
2.1
通讯作者：
D. Henninger
中科院分区：
文献类型：
--
作者：
S. L. Steinberg;D. Ming;K. E. Henderson;C. Carrier;J. Gruener;D. Barta;D. Henninger
水培传统上用于受控环境生命支持系统（CELSS），因为根的最佳环境支持高生长速率。最近的发展，在zeoponic基质和微孔管灌溉（ZPT）也提供了高度控制的根环境。本研究比较了ZPT和水培两种不同水分和养分状况对小麦生长和产量的影响。CV. USU-Apogee）。在受控环境中的并行测试中，小麦在ZPT和再循环水培中生长至成熟。在这两种培养系统中生长的植物用水量达到峰值，在15至20 L m-2 d-1的第40天，之后，它下降得更快，由于早期衰老的叶片生长在ZPT文化的植物。在两种培养系统中生长的植物之间没有一致的水分状况差异。虽然产量是相似的，收获指数是28%，低于ZPT比水培植物生长。无菌绿色分蘖分别占ZPT和水培植物生物量的12%和0%。生物量分配的差异主要归因于NH4-N营养的植物生长在ZPT相比，在水培营养液中的NO3-N。这是可能的，NH 4-N诱导的钙缺乏产生过量的分蘖和较低的收获指数生长在ZPT培养的植物。这些结果表明，进一步改进zeoponic底物将使ZPT培养物成为在CELSS中实现高生产率的可行替代方案。
Hydroponic culture has traditionally been used for controlled environment life support systems (CELSS) because the optimal environment for roots supports high growth rates. Recent developments in zeoponic substrate and microporous tube irrigation (ZPT) also offer high control of the root environment. This study compared the effect of differences in water and nutrient status of ZPT or hydroponic culture on growth and yield of wheat (Triticum aestivum L. cv. USU-Apogee). In a side-by-side test in a controlled environment, wheat was grown in ZPT and recirculating hydroponics to maturity. Water use by plants grown in both culture systems peaked at 15 to 20 L m-2 d-1 up to Day 40, after which it declined more rapidly for plants grown in ZPT culture due to earlier senescence of leaves. No consistent differences in water status were noted between plants grown in the two culture systems. Although yield was similar, harvest index was 28% lower for plants grown in ZPT than in hydroponic culture. Sterile green tillers made up 12 and 0% of the biomass of plants grown in ZPT and hydroponic culture, respectively. Differences in biomass partitioning were attributed primarily to NH4-N nutrition of plants grown in ZPT compared with NO3-N in hydroponic nutrient solution. It is probable that NH4-N-induced Ca deficiency produced excess tillering and lower harvest index for plants grown in ZPT culture. These results suggest that further refinements in zeoponic substrate would make ZPT culture a viable alternative for achieving high productivity in a CELSS.