Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 227-239 |
| Journal | Netherlands Journal of Agricultural Science |
| Volume | 44 |
| Publication status | Published - 1996 |
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Effects of nitrogen on accumulation and partitioning of dry matter and nitrogen of vegetables. 3. Spinach. / Biemond, H.; Vos, J.; Struik, P.C.
In: Netherlands Journal of Agricultural Science, Vol. 44, 1996, p. 227-239.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Effects of nitrogen on accumulation and partitioning of dry matter and nitrogen of vegetables. 3. Spinach.
AU - Biemond, H.
AU - Vos, J.
AU - Struik, P.C.
PY - 1996
Y1 - 1996
N2 - Four greenhouse and 2 field experiments (the latter on a sandy soil) were carried out with different amounts and dates of N application to analyse the dynamics of dry matter and N accumulation in spinach (cv. Trias). Frequent measurements were carried out on dry matter and N accumulation in leaf blades, petioles and stems. The total accumulation of dry matter and N differed largely among and within experiments. Increasing N application increased yield of dry matter and N accumulation, whereas splitting N applications had much smaller effects. However, the partitioning of dry matter and N proved insensitive to N treatments. Harvest indices for dry matter (about 0.67) or N (about 0.74) of crops at a marketable stage were fairly constant over treatments and experiments. Increasing or splitting the N application affected N accumulation more than dry matter production, resulting in large effects on N concentrations. The lack of variation in response to N for different N regimes facilitates the development of N application techniques aimed at high yield, high quality and reduced emissions. The organic N concentration of leaf blades and petioles decreased with leaf age, although in most experiments this decrease was smaller at higher leaf numbers. The nitrate-N concentration decreased with increasing leaf number at any sampling date; it was higher when N was abundant. High yields in autumn crops were associated with high nitrate concentrations but also with potentially high losses of N.
AB - Four greenhouse and 2 field experiments (the latter on a sandy soil) were carried out with different amounts and dates of N application to analyse the dynamics of dry matter and N accumulation in spinach (cv. Trias). Frequent measurements were carried out on dry matter and N accumulation in leaf blades, petioles and stems. The total accumulation of dry matter and N differed largely among and within experiments. Increasing N application increased yield of dry matter and N accumulation, whereas splitting N applications had much smaller effects. However, the partitioning of dry matter and N proved insensitive to N treatments. Harvest indices for dry matter (about 0.67) or N (about 0.74) of crops at a marketable stage were fairly constant over treatments and experiments. Increasing or splitting the N application affected N accumulation more than dry matter production, resulting in large effects on N concentrations. The lack of variation in response to N for different N regimes facilitates the development of N application techniques aimed at high yield, high quality and reduced emissions. The organic N concentration of leaf blades and petioles decreased with leaf age, although in most experiments this decrease was smaller at higher leaf numbers. The nitrate-N concentration decreased with increasing leaf number at any sampling date; it was higher when N was abundant. High yields in autumn crops were associated with high nitrate concentrations but also with potentially high losses of N.
M3 - Article
VL - 44
SP - 227
EP - 239
JO - Netherlands Journal of Agricultural Science
JF - Netherlands Journal of Agricultural Science
SN - 0028-2928
ER -