Response of Plant Diversity in Desert Grassland to Nutrient Elements Addition
Received date: 2012-08-10
Revised date: 2012-10-22
Online published: 2012-10-22
Based on field measurement of plant species and their abundance, the response of plant diversity in deserted grassland near the Gurbantunggut Desert in Xinjiang on different nutrient elements addition were researched, seven nutrient treatments of N, P, K, NP, NK, PK, NPK addition were set up. Some conclusions were as follow: (1) under the three treatments of P, NP, PK addition, the richness index increased significantly, while other treatments had no significant effect on the richness. Even some treatment, such as NK addition, reduced the richness index of the study area. The species number showed the same characteristics with the richness index under different nutrient addition. (2) The impact of nutrient addition treatment on plant diversity is different: compared with the CK, the Simpson index, Shannon index, and Pielou index increased significantly (p＜0.05) under the treatments of P addition and NP addition, which showed that the optimal for deserted grassland near the Gurbantunggut Desert were P and NP nutrient addition. (3) The variation of plant richness index in the inter-annual performed increased first and then declined, the change in evenness, diversity index are increasing trend.
Key words： deserted grassland; nutrient addition; plant diversity
TU Wen-xia1 , YE Mao1 , XU Hai-liang2 , ZHAO Xin-feng2 . Response of Plant Diversity in Desert Grassland to Nutrient Elements Addition[J]. Journal of Desert Research, 2013 , 33(5) : 1349 -1355 . DOI: 10.7522/j.issn.1000-694X.2013.00198
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