Understanding grasses

25 June 2021 | Agriculture

Windhoek • Erastus Ngaruka

In Namibia, livestock production is heavily dependent on the rangeland, which grows a variety of forage resources including trees, shrubs, grasses, and forbs. These plants differ in growth forms, structure, life cycles, habitat preferences, and their uses. Livestock farming in the country is dominated by grazing livestock, mainly cattle and sheep. Moreover, these animal species mainly depend on grass amongst others for their nutrition.
When one describes a grazing area, there are several attributes that should be key to determining the grazing value of that area. These are grass species composition, frequency, abundance, density, and soil cover amongst others.
Basically, the quality of the grass plant can be attributed to its species, growth structure and life cycle.
Farmers commonly use the term palatability as an assertion of the quality of the grass, however, grasses have different levels of palatability. A palatable grass is one that an animal is attracted to or selects amongst others to graze, and this is influenced by its smell, taste, nutrients, and digestibility.
Therefore, selective grazing becomes dangerous especially when species diversity or composition is narrow, thus, leading to local extinction of very sensitive valuable grass species.
One of the important attributes that farmers should understand is the grass life cycle or life span.
There are two different life spans under which grasses can be classified, annual and perennial. The annual grasses refer to grasses that have a shorter life span of less than a year. They grow fast, produce seeds quickly and shed seeds for reseeding, and then the mother plant dies. Usually, annual grasses emerge with the first rainfall or are only seen during the wet season but disappear during the dry season, usually by August.
Many grazing areas in Namibia are dominated by these types of grasses as their dominance increases with rangeland degradation.
On the other hand, perennial grasses have a longer life span or last for more years. Unlike annuals, they do not die after shedding seeds, but only undergo a dormancy period (stop growing) during the dry season to conserve nutrients for regrowth from the same stump in the next rainy season. There are many different species of perennial grasses, however, not all are palatable or well utilized by grazing animals. The most valuable perennial grasses are more sensitive to continuous grazing; thus, their dominance decreases with overgrazing or rangeland degradation which in turn gives rise toaggressive establishment of annual grasses.

Know the impact
To make informed grazing management decisions, farmers need to know and understand the impact of the prevailing ecological perturbations, including herbivory, climate, and intra-and inter-specific species competitions amongst others. The reaction of the rangeland to these perturbations can be observed through its plant population establishment and distribution.
The dominating annual grasses in almost all grazing areas in Namibia currently include Schmidtia kalahariensis, Chloris virgata, Eragrostis porosa, Eneapogon cencroides, and Urochloa brachyuraamongst others. The dominating perennial grasses are Stipagrostis uniplumis, Stipagrostis obtusa, Stipagrostis hochstetteriana, Eragrostis pallens, Eragrostis rigidior, and Aristida stipitata amongst others.
The most valuable perennial grasses such as Cenchrus ciliaris, Brachiaria nigropedata, Anthephora pubescens, and Schmidtia pappophoroides are only observed in well managed or least disturbed areas in some parts of the country. Farmers can obtain more knowledge of these grasses from descriptive literature books (e.g. Grasses of Namibia) and can find common names as well. These literature materials and information can be found on the internet, book shops, Namibia Botanical
Research Institute, and university libraries, amongst others.
It is advisable that farmers engage in restorative practices on their rangelands. These include improving soil conditions, controlling bush densities, reintroducing the valuable perennial grasses by reseeding on their grazing areas, and to cultivate them in gardens or crop fields. These efforts should all be aimed at reducing pressure and adding value on the rangelands, and to ensure sustainable fodder availability for livestock.
Lastly, farm with nature and farm with grass for profit.
*Erastus Ngaruka is Agribank’s Technical Advisor: Livestock & Rangeland

Similar News


Omaheke remains cattle capital

21 hours ago | Agriculture

Omaheke governor Pijoo Nganate said the region continues to be the champion in beef production, with emphasis on breeds that capitalise on maximum output of...

Transforming agribusinesses into generational enterprises

1 week ago - 21 July 2021 | Agriculture

Windhoek • Hanks SaisaiBuilding a sustainable and reputable farming business is a journey that requires commitment, dedication, and hard work from a farmer and all...

The basics of livestock breeding

2 weeks ago - 16 July 2021 | Agriculture

Windhoek • Erastus NgarukaNamibia is predominantly a meat (cattle, sheep, goat) producing country, and many farmers are working hard to improve the genetics and performance...

Basic considerations on livestock handling

4 weeks ago - 05 July 2021 | Agriculture

Windhoek • Erastus NgarukaHandling livestock is always a risky exercise that can culminate into significant livestock injuries and deaths on farms because of improper livestock...

Crop diseases and their control measures

1 month - 29 June 2021 | Agriculture

Windhoek • Hanks SaisaiCrop production has been carried out since time immemorial and mainly involves the tilling or cultivating of the soil to sow seeds...

Boost for city’s urban garden

1 month - 27 June 2021 | Agriculture

The City of Windhoek (CoW) secured N$1.92 million from the United Nations Development Programme (UNDP) to develop and boost agricultural food production of Farm Okukuna,...

Learn the ins and outs of agriculture online

1 month - 27 June 2021 | Agriculture

Agribank launched a two-season podcasting service that covers eight episodes each. The podcasts are hosted by Ndeshihafela Shinedima (aka Reina Nelao), Agribank’s brand ambassador for...

Phase feeding in chicken production

1 month - 24 June 2021 | Agriculture

Windhoek • Hanks SaisaiChicken production is a lucrative enterprise that offers a competitive income for farmers that specialize in meat or egg production. However, to...

Charcoal activities unleash large-scale bush fires

1 month - 17 June 2021 | Agriculture

Windhoek • [email protected]astating bush fires allegedly sparked by charcoal burning operations have razed around 35 000 hectares of grassland to the ground across seven farms...

Second Online Agriculture Series on the cards

1 month - 16 June 2021 | Agriculture

Bank Windhoek hosts its second Online Agriculture Series on Wednesday and Thursday (23 & 24 June) themed “Innovation and Trends that will shape the future...

Latest News

ICU bed occupancy reduced by...

1 hour ago | Health

Health minister Kalumbi Shangula said the hospital bed occupancy rate, especially in intensive care units, has significantly improved in most of the regions, following a...

Why appointing a proxy and...

3 hours ago | Opinion

Windhoek • Taswald JulyMost of us have probably faced death and thought about our own mortality more often, and however daunting the prospect may be,...

Ways to renovate without losing...

3 hours ago | Life Style

For many, the history of a home is what makes it appealing.However, as charming as antique archways and brass finishes might be, rusty pipes and...

Lead by example

3 hours ago | Opinion

Windhoek • Ester KaliDuring these trying times, it is important to approach every situation with as much grace, kindness, faith and empathy as possible. Today,...

Book your cancer screening now

4 hours ago | Health

The Cancer Association of Namibia hosts the next Women's Health Community Clinic in Windhoek on Thursday (5 August 2021), when screenings are carried out for...

The perfect San storm

5 hours ago | Social Issues

The year 2021 has not brought any respite to Namibia from the tragedy and hardship that befell the nation through the Covid-19 pandemic. In fact,...

Segura spog met nuwe winkel

5 hours ago | Business

Windhoek • [email protected] Emporium het begin as ’n aanlynwinkel, maar spog nou met ’n splinternuwe instap winkel inKlein Windhoek.Volgens eienaar Marilie van Schalkwyk, wil sy...

Omaheke remains cattle capital

21 hours ago | Agriculture

Omaheke governor Pijoo Nganate said the region continues to be the champion in beef production, with emphasis on breeds that capitalise on maximum output of...

Supreme Court to review 50-year...

3 days ago - 30 July 2021 | Justice

Windhoek • [email protected] man serving a 50-year prison sentence for the panga murders of a Russian couple 13-years ago has been granted leave to appeal...

Load More