| Autor: |
Bashir, Hafsa, Ahmad, Sheikh Saeed, Nawaz, Muhammad, Shahzad, Salma, Gishkori, Rubina, Jawad, Yusraw |
| Předmět: |
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| Zdroj: |
Pakistan Journal of Life & Social Sciences; 2018, Vol. 16 Issue 1, p35-41, 7p |
| Abstrakt: |
Weeds, spontaneously growing vegetation, are affected by environmental gradients. The present study was conducted along Khanpur dam, Pakistan with the objective to determine the weed status and subsequent effect of environmental variables. Environmental factors were also considered to record the data regarding occurrence of weed species in the study area. Different factors including pH, electrical conductivity, organic matter saturation, macronutrients and micronutrients were determined while weed species were determined using Canonical Correspondence Analysis. About 100 species in to four groups were collected along with the Dam and corresponding soil samples were also collected for the study of different nutrients. Environmental factors influenced the frequency of species in a clear way. The results showed that among all the groups, Cynodon dactylon and Cannabis Sativa were the most occurring species with the occurrence rate of about 70%. The Salvia moorcroftiana was the second most occurring weed specie in the area with the frequency of about 30% in all four groups. Among all environmental factors, iron was found most significant factor and its rate of effect was about 60% as compared to that of rest of the factors. The order of intensity of occurrence of species was Cynodon > Cannabis >Salvia > while soil nutrients were in the order of iron >zinc > phosphate. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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