Impact of fertilizer rates on the yield and quality of alfalfa on a sod podzolic loamy sand | Lucernas ražība un kvalitāte velēnu podzolētā augsnē pie dažādiem minerālmēslu līmeņiem
2008
Agafonova, L., Latvia Univ. of Agriculture, Skriveri, Aizkraukle reg. (Latvia). Agency Research Institute of Agriculture
English. A 5-year field study was conducted near Skriveri, Latvia at the Research Institute of Agriculture of the Latvian University of Agriculture. The results of investigations with alfalfa on well-cultivated sod-podzolic light loamy soil are presented. It is shown that the optimum NPK fertilizer dose in consideration of the size of the yield of dry matter and its nutritive value was P120K160, comes to 8.10 t haE-1. Mineral fertilizers favour the rise of the collection of total protein, with higher doses the collection of protein increased by 1.5 times. It is found that in the optimum trial variant (N20P120K160) provided the most alfalfa yield with good quality, the specific nitrogen removal amounted to 266 kg ha-1; P2O5 -55 kg haE-1 and K2O -271 kg haE-1.
Show more [+] Less [-]Latvian. Rakstā apkopoti LLU aģentūras Zemkopības zinātniskā institūta lucernas 5-gadīgie pētījumu rezultāti. Pētījumi veikti velēnu podzolētā augsnē ar dažādām NPK mēslojumu devām. Minerālmēslojums būtiski palielināja lucernas zaļās masas ražu. Pie optimālā NPK mēslojuma attiecības (N20P120K160) ieguva 8.10 t haE-1 sausnas. Minerālmēslojums sekmēja arī kopējā proteīna ieguvi, pie paaugstinātas devas N20P120K160, proteīna ieguve palielinājās 1.5 reizes. Mēslojot lucernu ar N20P120K160, iegūtā lucernas sausnas raža no augsnes iznes N-226 kg haE-1, P2O5 – 55 kg haE-1 un K2O – 271 kg haE-1.
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