Potential growth of alfalfa (Medicago sativa L.) in the desert of Southern Peru and its response to high NPK fertilization

Versteeg, M. N.; Zipori, Isaac; Medina, J.; Valdivia, H.

doi:10.1007/978-94-009-7639-9_14

Cited by 3 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a realistic comparison of estimates of nitrogen fixation by forage crops, the length of the growing season and the total dry matter yield have to be considered (Heichel et al, 1981). For a full 12-month growing season ex tremely high rates of nitrogen fixation have been reported; 406-681 kg ha" 1 for white clover in New Zealand (Sears et al, 1965) and of about 1000 kg ha" 1 for lu cerne in Peru (Versteeg et al, 1982). The length of the growing season of lucerne in the Netherlands is about 6 months; from mid-April to mid-October.…”

Section: Discussionmentioning

confidence: 99%

Dry matter production and nitrogen utilization in cropping systems with grass, lucerne and maize. 2. Nitrogen yield and utilization.

Spiertz¹,

Sibma²

1986

NJAS

View full text Add to dashboard Cite

The N yield and the N use efficiency were studied in a 3-year experiment with various cropping systems of Lolium perenne, Medicago sativa and maize. N yields of L. perenne and maize were about 450 and 200 kg/ha, resp. N yields of M. sativa ranged from about 400 to 600 kg/ha depending on crop age and weather conditions. N fixation rates of M. sativa were assessed in 1982 and ranged from 107 to 507 kg/ha for high (450 kg N/ha) and no N fertilization, resp. The after-effects of 1-, 2- and 3-year crops of L. perenne, M. sativa and maize on the DM and N yields of a test crop of maize were measured. Depending on the age of the preceding L. perenne crop, annually supplied with 450 kg N/ha, the N after-effects ranged from 120 to 175 kg/ha. The after-effect of a previous cropping with M. sativa was independent of the N dressing and ranged from 140 to 175 kg/ha. For comparison, the after-effect of a preceding maize crop ranged from 90 to 110 kg/ha. Mineral soil N reserves were determined in spring and autumn. (Abstract retrieved from CAB Abstracts by CABI’s permission)

show abstract

Section: Discussionmentioning

confidence: 99%

Dry matter production and nitrogen utilization in cropping systems with grass, lucerne and maize. 2. Nitrogen yield and utilization.

Spiertz¹,

Sibma²

1986

NJAS

View full text Add to dashboard Cite

show abstract

“…It can be demonstrated, however, that active ly growing closed crops are able to take up considerably more. Calculations based on data from Italian ryegrass and turnips (Darwinkel, 1975), broad beans (Dantuma & Klein Hulze, 1979) and lucerne (Versteeg et al, 1981) indicate rates of up take between 6 and 9 kg ha-May-'. These figures clearly demonstrate that crops, in cluding leguminous crops, can take up nitrogen far beyond the limit of 5 kg N ha^day-1 proposed by Sinclair & de Wit (1975).…”

Section: Discussionmentioning

confidence: 99%

Distribution of dry matter and nitrogen between the different plant parts in intact and depodded soyabean plants after flowering.

Alberda¹,

Boer²

1983

NJAS

View full text Add to dashboard Cite

Soyabeans were grown in nutrient sol. in a controlled environment. 50% developed normally but the rest were depodded once a wk. During 9 wk of seed development, growth of roots, shoots, leaves and pods as well as their total percentage N was monitored by weekly harvests. In the normal plants, only the pods continued to increase in dry wt. after the 2nd harvest and the wt. of the other plant parts remained nearly constant. N in roots and stems decreased slightly during pod filling and N in the leaves decreased considerably. Increase in N in the pods was relatively greater than the increase in total dry wt. The amount of N taken up from the nutrient sol. and that redistributed between plant parts was calculated. In the depodded plants, DM continued to accumulate in all plant parts throughout the experiment including the detached pods. The amount of N also increased in all plant parts. N uptake/unit DM produced was about the same for both groups of plants. The results are discussed in relation to the hypothesis that in leguminous plants the fixation or uptake of N by the roots cannot cope with the demand of the developing pods so that the necessary withdrawal from other plants parts, especially the leaves, causes the plants to die prematurely. (Abstract retrieved from CAB Abstracts by CABI’s permission)

show abstract

“…The level of this ceiling yield depends on the time of the year and on plant species. It is not only found with grasses but also with legumes (Versteeg et al, 1981). Usually, the heavier the cut the smaller the leaf area left after cutting.…”

Section: Discussionmentioning

confidence: 99%

The influence of length of growing period, nitrogen fertilization and shading on tillering of perennial ryegrass (Lolium perenne L.).

Alberda¹,

Sibma²

1982

NJAS

View full text Add to dashboard Cite

The formation and death of tillers was studied in swards of perennial ryegrass. These swards differed in the length of the growing period and in the amount of N applied after each cut. Tillers died faster after a 6-weekly growing period than after a 4-weekly period. Some plants were far more affected than others, often resulting in the complete death of plants and thus in open spaces in the sward. Shading experiments suggested that plant deaths resulted from mutual shading. Small plants are shaded by taller ones and have a lower reserve content and a therefore higher death rate. High cutting frequencies or low N application rates could prevent open spaces from appearing or could be used to rehabilitate an open sward provided it was not yet infested with unwanted species. (Abstract retrieved from CAB Abstracts by CABI’s permission)

show abstract

Potential growth of alfalfa (Medicago sativa L.) in the desert of Southern Peru and its response to high NPK fertilization

Cited by 3 publications

References 1 publication

Dry matter production and nitrogen utilization in cropping systems with grass, lucerne and maize. 2. Nitrogen yield and utilization.

Dry matter production and nitrogen utilization in cropping systems with grass, lucerne and maize. 2. Nitrogen yield and utilization.

Distribution of dry matter and nitrogen between the different plant parts in intact and depodded soyabean plants after flowering.

The influence of length of growing period, nitrogen fertilization and shading on tillering of perennial ryegrass (Lolium perenne L.).

Contact Info

Product

Resources

About