Paulownia Irrigation - Paulownia Tree Leaves
Paulownia Tree Leaves

Cultivation of Paulownia - 6. Irrigation & Fertilization

To its great sorrow the editorial team of ‘Kalliergeia‘ announces that the popular tribute to the cultivation of Paulownia has come to an end. But also feels the need to supplement itself, and at first it was back in the same way it would do: it would express its great sorrow by drinking fine champagne and eating molluscs and winkles.

Convinced, therefore, that did its duty fully to Paulownia, is promises more criminally character tributes in new and old plant species and crops.

Until then, ‘Paulownia Irrigation and Fertilization‘.

Curtain.

Cultivation of Paulownia

Paulownia irrigation - Paulownia plantation by drip irrigation.
Paulownia plantation by drip irrigation

The Requirements of Paulownia in Water

In China, Paulownia grows in areas with an annual rainfall of 500-3000 mm.

If planted in areas with smaller and uneven monthly rainfall distribution, especially in the growth period, then it is necessary to irrigate.

The requirements for the Paulownia irrigation and, more generally, the water needs of the tree, differ from species to species.

Paulownia catalpifolia is more demanding, followed by P. Fortunei, P. Kawakami and P. elongata.

Paulownia tomentosa is the most drought-tolerant species.

Cultivation of Paulownia

Paulownia Irrigation - Paulownia Irrigation System
Paulownia Irrigation System

Watering the Trees

A general principle for proper watering of trees and, of course, for Paulownia irrigation is that for one and the same quantity of water, one application is preferable than most (except very light, sandy soils).

And the reason is that water scarcely maintains only the surface layer of the soil, which does not favor the spread of the root.

Indeed, under these conditions the root system is stuck in this layer and does not grow in depth resulting in the relatively greater dependence of the trees on the irrigation provided.

Cultivation of Paulownia

Paulownia Irrigation - Paulownia Seedling Irrigation.
Paulownia Seedling Drip Irrigation
Pruning of Paulownia - One Year Paulownia Plantation
One Year Paulownia Plantation

Paulownia Irrigation

If the rainfall during the first planting season of seedlings is less than 150 mm per month the Paulownia irrigation is necessary.

The following years is necessary if the rainfall is less than 50 mm per month.

The best results for the irrigation of Paulownia is given by the dripping method.

When new plantations of Paulownia are to be establishment, watering in the field is carried out with plenty of water – provided they have not been rained before – before planting the seedlings.

Then, on the day of planting, new irrigation takes place again with plenty of water, and the next irrigation takes place 2-4 days later.

For the next two to three weeks, 10-30 liters of water per day and plant are given daily, then the irrigations are diluted to 1 to 2 per week.

For established plantations, it is recommended that in the growth period, irrigate takes place 1 to 2 times a week with 20-50 liters per tree – depending on the size of the tree and the soil / climate conditions.

Cultivation of Paulownia

Paulownia Irrigation - Irrigation of New Paulownia Plantation
Irrigation of New Paulownia Plantation
Paulownia planting - Paulownia in Blooming
Paulownia in Blooming

Paulownia Fertilization

While Paulownia is not particularly demanding in fertilizing, however, for the production of superior quality timber and for the increase of harvested biomass, addition of fertilizers is required. After the short rotation crop, the addition of fertilizers is necessary.

When a new plant is planting, it is proposed to incorporate in planting hole 200 g / tree triple superphosphate, potassium phosphate 120 g / tree and 150 g / tree ammonium nitrate.

In Paulownia plantations it is recommended to apply a complete NPK (trace mineral) fertilizer of 1.5: 1: 1 ratio and 50-100 g / tree every 3 to 4 weeks.

For stubborn plantations fertilization is not recommended. On the contrary, recommended listening.

Goodbye Paulownia, we will miss you so.

  1. Wayne K. Clatterbuck, Donald G. Hodges, Tree Crops for Marginal Farmland, Paulownia, With a Financial Analysis, University of Tennessee Extension, 2004
  2. L. Barton, I. D. Nicholas and C. E. Ecroyd., Paulownia., Forest Research Bulletin No. 231, 2007
  3. Pirro Icka, Robert Damo, Engjëllushe Icka., Paulonia tomentosa, a fast growing timber. The Annals of ‘Valahia’ University of Targoviste, 2016
  4. Graves, Donald H., 1989. Paulownia Plantation Management: A Guide To Density Control and Financial Alternatives. Forestry Extension Series. No. 1. College of Agriculture, Cooperative Extension Service, Univ. of Kentucky.
  5. Stringer, Jeffrey W., 1986. A Practical Method For Production Of Paulownia Tomentosa. Tree Planters Notes. Spring 1986, σελ. 8-11.
  6. Javad Eshaghi Rad, Seyed Rostam Mousavi Mirkala, Irrigation effects on diameter growth of 2-year-old Paulownia tomentosa saplings, Journal of Forestry Research March 2015, Volume 26, Issue 1, pp 153–157.
  7. Peter R. Beckjord and Maria S. Mcintosh, Paulownia tomentosa: Effects of Fertilization and Coppicing in Plantation Establishment, Southern Journal of Applied Forestry · May 1983, pp 81–85
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