Fertilization and quality of seed material on family FSP of English oak in the Tambov Region

Abstract

Yield assessment and study of the impact of pests and diseases on the quality of English oak seeds in 2018-2021 performed on 3 family forest seed plantations (FSP) of the first order, established in 1996-2011. Acorns of plus trees of known origin, and located on the territory of the forest fund of the Uvarovsky, Kirsanovsky and Michurinsky forestries of the Tambov region. On FSP, the vast majority of trees has not entered the stage of active fruiting and do not bear fruit, or with a certain periodicity they give weak, less often medium, or even more rarely plentiful yields. Separate fields of FSP planted in different years differ in yield. Separate fields of FSP planted in different years differ in yield. Weak and medium yields are characterized by especially low quality of fruits due to their damage by 92-100% by carpophages and diseases, including acorn weevil (up to 98%), codling moth (up to 19.8%), mummification (up to 6.8 %) and rot (up to 21.6%) A strong and widespread damage to the leaf apparatus by powdery mildew, which develops at the epiphytotic level annually, has a certain effect on the amount of the crop. Over the entire observation period, a plentiful harvest was noted only in 2018, when the yield on the FSP of the Uvarovsky forestry was 837 kg/ha. At the same time, high-quality acorns were formed in significant quantities in 2018 on field No. 1 of the Michurinskaya FSP, where 147 kg / ha were collected.