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Chicory

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Submitted By adamsj4
Words 1598
Pages 7
Lincoln University
Literature review

Question: Discuss the potential contribution that chicory could make to New Zealand farming systems

Title: Chicory’s (Cichorium intybus) agronomic principles, contribution to farming and the associated limitations- an analysis

Summary
Chicory (Cichorium intybus) is an increasingly popular crop that is excellent in providing high quality feed and high mineral content to grazing animals. Chicory is fast to establish and competitive for its resources given the right conditions, thus has high yields that occur in autumn, spring and summer. Yields expected, range from 8- 10t/ ha which consist of green leaf tissue which is valuable to New Zealand farms. The aim of the report is to find out the potential contribution of chicory to New Zealand farms by its agronomic principles, main advantages and the associated limitations. The literature covered in the findings is from Australian and New Zealand journals and websites, majority being by New Zealand researchers. Findings suggest that chicory is beneficial to New Zealand system under the right conditions following certain guidelines and recommendations. Deer and lambs can do better on chicory rather than the traditional ryegrass (table 1). Other findings suggest that climate change will have an impact on plant growth in chicory. Introduction
Chicory is classed as a forage crop that belongs to the Asteracea family. It is commonly used as a specialist summer feed crop which is vital during summer and spring. Unique advantages of the crop ranges from maintaining and increasing the feed supply and quality whilst also providing a source of minerals to the grazing animal.
Agronomic characteristics
Chicory is renowned for its high quality, digestibility and mineral content hence why it is popular for all stock classes and preferred by them. Growth predominately occurs in the spring at 150kg DM/ ha/ day (M, 1986) as a result of rapid development in reproductive tillers. During the first growing season, chicory has one crown intact and for the following seasons multiple crowns are then established. (1995). The capability of the plant to regenerate and protect the crown and tap root is diabolical. The deep tap root of the plant gives invaluable resilience for survival access any moisture and be more tolerable in the conditions. This unique anatomical ability gives chicory the capability to yield 10t/ ha in good situations. However this production is not constant. Chicory is non- existent in winter due to its dormancy and this literally means there is no production.
Chicory thrive on free-draining soils with medium to high fertility. The constant supply of fertiliser is necessary to sustain high production. The fertiliser requirement differs depending on the initial soil status. The following nutrient requirement are normally, Olsen Phosphorus (P) 20-30mg kg-1, and potassium (K) >8mg kg-1, and sulphur (S) >10 mg kg-1 (1993). The recommended maintenance rate (2002) suggests 35 kg N ha-1, 35 kg P, and K ha−1, and 20–30 kg S ha−1 is sufficient by early spring. In order for the fertiliser to be most effective the water supply must be adequate.
Main impacts (Cichorium intybus) has on New Zealand farms
The primary contribution of herbs in pastoral systems is to provide high quality, mineral rich feed in the spring and summer to maintain or increase feed supply. The pasture supply isn’t always at optimal, hence why the incorporation of chicory is so valuable. Potentially the yield can reach10t/ ha of green tissue that is very palatable by animals and is preferred by deer. Chicory grazing equated in higher LW gains for lambs figure 1 (PGG, 2009)

. Results from table 1 below (Agricom, 2009) identifies that live weight gain of lambs on chicory is averaged at 230g/ day and deer at 265 g/ day. The data was collected by two different researchers to give a more accurate result. This is leading research and will change the plant production in many systems, if possible, to receive higher weight gains.

Without question it is chicory that is the biggest contributor to weight gain in the performed research. Perennial rye grass isn’t always the best option. New Zealand pest and disease pressures are coherent in most if not all plant species. Chicory on the other hand doesn’t have that problem with very minimal risk of getting rust. This is excellent and means that production is maximised and there is less expense on protecting the crop.
Chicory performs best when is grown with a legume, either white or red clover. Legumes fixate 25kg of N/ t DM and this is a great source which chicory benefits from.

Factors limiting potential performance
In order to gain maximum growth from chicory the water and fertiliser quantity sufficient is absolutely critical. When the water levels aren’t moderate the chicory production can severely suffer, therefore resulting in. Heat stress can cause an array of morpho-anatomica, physiological and biochemical changes in plants as researched (Wahid, et al. 2007) indicates that the heat stress will result in irreversible damage in growth and production.
(Wahid, et al. 2007) studies the climate effect on plant science. “Transitory or constantly high temperatures cause an array of morpho-anatomical, physiological and biochemical changes in plants, which affect plant growth and development and may lead to a drastic reduction in economic yield.” The adverse effects of heat stress can be mitigated by developing crop plants with improved thermo tolerance using various genetic approaches- which is the main objective.
The external environment is forever changing and somewhat unpredictable. This in a way scares the breeder/ farming but at the same time excites them as innovation and opportunity takes place. Production in general is variable between species but realistically there is only so much tolerance accepted. In particular, chicory is susceptible to dry land condition and is facing an upward battle with the added pressure of climate changes. Simply, it may not be economic to have chicory as a forage crop and other species may take its place in the system. Especially with the ongoing dilemma associated with climate change, which will directly affect the crop yields via increased surface temperatures, this also induces bolting in chicory. Chicory will not resist and the yield will be significantly reduced as well as increased flowering. The improvement of chicory cultivars is very important for the future.
Good human management of the crop is essential in order to maintain the quality. To do it properly the grazing management needs to be correct and at times needs to be enforced when the reproductive stem starts generating. Research by (2005) indicated that quality is best when the grazing management is sufficient at given times.
Rotational grazing is ultimate and is recommended for persistency and high quality forage long term. Hard and spontaneous grazing is strictly forbidden as it damages the plant. Chicory is sensitive to hard and regular grazing because of the likelihood of it damaging the crown. (Agricom, 2009) acknowledges that forward planning is essential in managing chicory. Management looks at limiting grazing primarily, whilst protecting the basal crown. The crown is a very important feature to protect and needs constant checking, as failing to do so leads to production decreases. It is important before allowing grazing that 2-4 leaflets are present.
Conclusion
Chicory (Chichorium intybus) has many underlying characteristics.

Description: * Perennial herb (3-5 years) * Performs well on most soils * Most persistent on light or free- draining soil * Needs M to H fertility * High quality, ME 13 - rich source of selenium and cobalt * Yielding potential 10 t/ha leaf mass * Most effective as special purpose forage crop * Best grown with red/ white clover

Awareness: * Critical to have moisture, nitrogen/ or legume. * Certain grazing practices apply: Avoid crown damage, regularity of grazing * Winter dormant

The importance of understanding your own constitute (environment, climate, soil properties) is fundamental to make conclusions on whether or not the system is suitable for chicory. Overall the chicory will benefit most farming systems. Like anything, there is room for improvement and I believe the cultivars need to be more tolerable of any condition and be less dormant. References
Agricom. (2009). Chocory guide for sheep and deer farms. Retrieved from http://www.agricom.co.nz/assets/files/nz/content_files/http://www.agricom.co.nz/assets/files/nz/content_files/Chicory%20Sheep%20Deer%20user%20guide%202009%20FINAL.pdf.

Guangdi, L., & Kemp, P. D. (2005). Forage Chicory (Cichorium intybus L.): A Review of Its Agronomy and Animal Production. In L. S. Donald (Ed.), Advances in Agronomy (Vol. Volume 88, pp. 187-222): Academic Press. Retrieved from http://www.sciencedirect.com/science/article/pii/S0065211305880058 http://ac.els-cdn.com/S0065211305880058/1-s2.0-S0065211305880058-main.pdf?_tid=d8ea3414-38d0-11e4-a7ab-00000aacb35f&acdnat=1410343217_b49e6bec540007e27a2f9ab943ca69b4. doi:http://dx.doi.org/10.1016/S0065-2113(05)88005-8

Hume, D. E., Lyons, T. B., & Hay, R. J. M. (1995). Evaluation of 'Grasslands Puana' chicory (Cichorium intybus L.) in various grass mixtures under sheep grazing. NZ J. Agric. Res., 38, 317-328.

M, H. (1986). Development of Grasslands Puana chicory (Cichorium intybus L.) seed and the determination of time of harvest for maximum seed yields. 4, 30-33.

Moloney, S. C., & Milne, G. (1993). Establishment and management of Puana chicory used as a specialist, high quality forage crop. Proc. NZ Grassl. Ass., 55, 41-46.

PGG, W. s. (2009). Forage focus. Retrieved from http://www.pggwrightsonseeds.com/uploads/Forage%20Focus%20No.%2010%20-%20Chicory%20Best%20Practice.pdf.

Upjohn, B., Kemp, D., & Parker, M. (2002). Chicory. NSW Agriculture. Wahid, A., Gelani, S., Ashraf, M., & Foolad, M. R. (2007). Heat tolerance in plants: an overview. 67, 199-223.

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