The responses of Pinus roxburghii and Quercus leucotrichophora to nutrient applications
Seedling growth of Pinus roxburghii Sarg. an early successional species, and Quercus leucotrichophora A. Camus a late successional species; was compared at five levels of nutrient application. Seedlings of the two species were grown in mixture (interspecific competition) and in monoculture (intraspecific competition). Nutrients were applied at five levels (0,144,264, 384 and 504 mg) of a 12:32:16 NPK fertilizer once each of the two growing season. The dry phytomass yield of P. roxburghii was greater than that of Q. leucotrichophora under all experimental conditions and the difference between the two species was greater in mixture. In monoculture dry phytomass of Q. leucotrichophoraseedlings generally increased with the amount of applied nutrients, but in competition with P. roxburghii it decreased. The Relative Yield (RY), Relative Yield Totals (RYT) and Relative Crowding Coefficient (RCC) indicate that P. roxburghii is a better competitor than Q. leucotrichophora. A comparison of replacement rates between Q. leucotrichophoraand P. roxburghii implies that Q. leucotrichophora is a poorer competitor at all the nutrient levels except for the lowest one.
© PRUNELLA Publishers
All rights reserved. No part of this publication may be reproduced, stored in retrieval system or transmitted in any form or by any means, photocopying, elctronic, recording, etc. without the prior written permission of the publisher, PRUNELLA Publishers - RNDr. Marián Janiga, CSc., Vavra Šrobára 1524/6, 03401 Ružomberok, Slovakia, IČO: 30 525 764. Permission requests for creating new collective works, for resale, for advertising or promotional purposes, or for general distribution, should be addressed to the publisher as mentioned in the Slovak Copyright Law. Free submission of an article for publication entails the author(s) irrevocable authorization of the publisher to collect any sums or considerations for copying or reproduction payable by third parties, as mentioned in the Slovak Copyright Law. Printed in June 2018. EV 3492/09.