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Physiological and Ecological Responses of Paspalum notatum Flugge to the Artificial Soil Active Nutrient Concentration(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年14
Page:
56-62
Research Field:
Publishing date:

Info

Title:
Physiological and Ecological Responses of Paspalum notatum Flugge to the Artificial Soil Active Nutrient Concentration
Author(s):
ZHENG Cheng1; CHEN Jing2; WU Bangzhi3; CHEN Zhang4
(1.Qianxi State-owned Forest Units，Qianxi，Guizhou 551500；2.School of Law，Shanxi University，Taiyuan，Shanxi 030006；3.Sichuan Woeryi Environmental Protection Technology Co.，Ltd.，Chengdu，Sichuan 610064；4.Institute of Loess Plateau，Shanxi University，Taiyuan，Shanxi 030006)
Keywords:
Paspalum notatum Flugge; active nutrient; soil and water conservation; nutrient use efficiency
PACS:
-
DOI:
10.11937/bfyy.201514017
Abstract:
Paspalum notatum Flugge was an important plant for the soil and water conservation and ecosystem reconstruction，and nutrients were important limiting factor for vegetation restoration of the damaged habitats.In order to ensuring the stability vegetation restoration of ecological engineering，the effect of different active nutrient concentrations on the germination rate，morphological characteristics，biomass and other seedling growth characteristics of Paspalum notatum Flugge by the outdoor simulation experiment were studied，as well as the characteristics of nutrient use efficiency.This provided the basis for design nutrients in ecological engineering.The results showed that the differences of germination rates between the treatment groups were significant (P<0.01)，and a significant negative correlation between the germination rates and the active nutrient concentrations was found.The germination rates showed a decrease with the increasing nutrient concentrations.The high concentration of active nutrients inhibited the germination of Paspalum notatum Flugge.The active nutrient had an influence on plant height，and the difference between the treatment groups were significantly (P<0.01).The average height of group C6（150%） was 23.20 cm which was the maximum，the average height of group CK （0%）was 16.30 cm which was the smallest at 300 days.The average biomass of group C6 was maximum，the average biomass of group CK was the smallest at 300 days.There were significant differences between the treatment group(P<0.01).The high concentrations of active nutrients had no significant effect on plant biomass accumulation.The nutrient use efficiency trends of N，P and K were that the nutrient use efficiency had deceased with the increasing active nutrient concentrations，there was a significant negative correlation between the nutrient use efficiency and activity nutrient content.All in all，the biomass of group C6 was the maximum，and the nutrient use efficiency was higher，which meet the requirements of ecological reconstruction.These results suggested that，group C6 was the best choice in the ecological engineering when Paspalum notatum Flugge was applied.

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Last Update: 2015-08-12