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Publication Date
1977
Description
There exists the relation y = y(x) = w(x) [N0 + q(x) x] , where x = nitrogen dose, q = apparent recovery of fertilizer nitrogen, N0 = amount of nitrogen present in the harvested plant matter in case of x = 0, w = internal efficiency of nitrogen taken up, and y = dry matter yield. The possibilities for improving q by way of plant breeding are rather limited because cultivated grasses usually take up almost the entire amount of available nitrogen. On the contrary, improvement of the internal efficiency w by breeding procedures offers much better opportunities. It may occasionally be useful to combine such improvement with increased nitrogen fertilization, the more so as w is strictly in the inverse ratio to the crude protein concentration of dry matter.
Citation
Kaltofen, Herbert, "Relations between nitrogen supply, nitrogen content of plants, internal efficiency of nitrogen, and yield with forage grasses" (1977). IGC Proceedings (1977-2023). 12.
(URL: https://uknowledge.uky.edu/igc/1977/sess1/12)
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Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Relations between nitrogen supply, nitrogen content of plants, internal efficiency of nitrogen, and yield with forage grasses
There exists the relation y = y(x) = w(x) [N0 + q(x) x] , where x = nitrogen dose, q = apparent recovery of fertilizer nitrogen, N0 = amount of nitrogen present in the harvested plant matter in case of x = 0, w = internal efficiency of nitrogen taken up, and y = dry matter yield. The possibilities for improving q by way of plant breeding are rather limited because cultivated grasses usually take up almost the entire amount of available nitrogen. On the contrary, improvement of the internal efficiency w by breeding procedures offers much better opportunities. It may occasionally be useful to combine such improvement with increased nitrogen fertilization, the more so as w is strictly in the inverse ratio to the crude protein concentration of dry matter.
