New Zealand Journal of Crop and Horticultural Science abstracts

---

Effect of late nitrogen on the yield and quality of spring sown `Rongotea' wheat

J. P. MILLNER1
J. M. McEWAN2
I. VALENTINE1

1Plant Science Department
Massey University
Palmerston North, New Zealand

2New Zealand Institute for Crop and Food
Research Limited
Private Bag
Palmerston North, New Zealand

Abstract  Three experiments were conducted at different sites in the Manawatu, New Zealand, to investigate the effects of late nitrogen (N) on the yield and baking quality of `Rongotea' wheat. Four rates of N were applied: 0, 20, 40, and 80 kg N/ha applied at Feekes' Growth Stage 9. Late N increased grain yield at two sites. Yield responses resulted from an increase in ears/m2 at one site and grain weight at the other. Grain protein % was increased by late N at all sites. Mechanical Dough Development (MDD) bake score, sodium dodecyl sulphate (SDS) sedimentation volume, water absorption, and optimum work input were all positively correlated with grain protein. The regression of SDS sedimentation volume on grain protein % was calculated for each site individually and also with data from all sites pooled. There were differences between the regressions from individual sites and the pooled regression indicating that site influenced the relationship between baking quality and grain protein %.

Keywords  wheat; nitrogen; yield; yield components; grain protein; bake score; SDS sedimentation volume

PDF file of entire paper: medium quality (606K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page