| |
| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/66/2/AJ0660020281
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Whitney, A. S. |
|---|
| Author Affiliation: | Associate Agronomist, Hawaii Agricultural Experiment Station, Kula, Hawaii |
|---|
| Title: | Growth of Kikuyugrass (Pennisetum clandestinum) under clipping. I. Effects of nitrogen fertilization, cutting interval, and season on yields and forage characteristics |
|---|
| Source: | Agronomy Journal. Vol. 66, No. 2, March/April 1974, p. 281-287. |
|---|
| Publishing Information: | Madison, WI: American Society of Agronomy |
|---|
| # of Pages: | 7 |
|---|
| Keywords: | TIC Keywords: Pennisetum clandestinum; Nitrogen fertilization; Mowing frequency; Seasonal variation; Yield response; Regrowth; Fertilization rates; Dry weight; Proteins; Nitrogen; Soil temperature
|
|---|
| Abstract/Contents: | "Kikuyugrass (Pennisetum clandestinum Hochst. ex Chiov.) is an important pasture forage, soil cover, and weed in many parts of the subtropics. Responses to N have been reported, but the relationships among management, climate, and forage production have not been well defined. We therefore studied the regrowth of kikuyugrass under 3 N levels (22, 56, and 168 kg/ha per year), and 3 cutting intervals (2, 5, and 10 weeks) for 3 years at 2 locations (Kula and Makawao, Maui). The Kula site was at 945-m elevation on an Eutrandept, and the Makawao site was at 660-m elevation on a Tropohumult. Average yields ranged from 4.8 to 29.4 metric tons/ha per year at Kula and from 10.2 to 32.5 metric tons/ha per year at Makawao. Average percent N in the forage was little affected by N rate except for an increase at the highest N rate at Makawao. Cutting at 2-week intervals reduced yields per unit time to 20 to 50% of the 10-week yields at Kula and to less than 15% of the 10-week yields at Makawao. Over a 3-year period, yields of 5-week regrowth (per unit time) were 32% of the 10-week yields at Kula but 65% of 10-week yields at Makawao. Crude protein levels in the forage under frequent cutting averaged 1.5 to 2.0 times that in 10-week regrowth. Two-week regrowth was also higher in acid-detergent solubles and lower in fiber and cellulose than 10-week regrowth. Ten-week regrowth from the high N treatment was higher in fiber and lignin than similar forage from the low or moderate N levels, indicating the need for careful management of N-fertilized kikuyugrass. Dry matter yields of 5-week regrowth fluctuated more with season than 10-week regrowth yields, ranging from 1.4 to over 100 kg/ha per day. Five-week regrowth yields were reduced by 11 kg/ha per day for each degree of decrease in average minimum soil temperature below 18 C (r2 = .93). Above 18 C, yields increased about 16 kg/ha per day for each 100 ly/day increase in average solar radiation (r2 = .64). Percent crude protein in the forage was inversely related to air or soil temperature and day length (multiple r2http://agron.scijournals.org/cgi/content/abstract/66/2 = .57). Residual effects of N fertilization were greater on the Tropohumult than on the Eutrandept. After 3 years of clipping, cations were severely depleted from the upper horizons of both soils." |
|---|
| Language: | English |
|---|
| References: | 21 |
|---|
| See Also: | Part 2 "Growth of kikuyugrass (Pennisetum clandestinum) under clipping: Part II: Regrowth characteristics in relation to Nitrogen fertilization and climate", Agronomy Journal, 66(6) November/December 1974, p. 763-767 R=7309 R=7309 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Whitney, A. S. 1974. Growth of Kikuyugrass (Pennisetum clandestinum) under clipping. I. Effects of nitrogen fertilization, cutting interval, and season on yields and forage characteristics. Agron. J. 66(2):p. 281-287. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=6799 |
| If there are problems with this record, send us feedback about record 6799. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/66/2/AJ0660020281
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 22 .A45 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
