A greater foraging scale, not a higher foraging precision, may facilitate invasion by exotic plants in nutrient-heterogeneous conditions.

Background And Aims: Soil nutrient heterogeneity has been proposed to influence competitive outcomes among different plant species. Thus, it is crucial to understand the effects of environmental heterogeneity on competition between exotic invasive and native species. However, the effects of soil nutrient heterogeneity on the competition between invasive and native plants have rarely been linked to root foraging behaviour.

A novel role of ethephon in controlling the noxious weed Ipomoea cairica (Linn.) Sweet.

Several auxin herbicides, such as 2, 4-D and dicamba, have been used to eradicate an exotic invasive weed Ipomoea cairica in subtropical China, but restraining the re-explosion of this weed is still a challenge. Since ethylene is one of the major intermediate functioning products during the eradication process, we explored the possibility, mechanism and efficiency of using ethephon which can release ethylene to control Ipomoea cairica. The results of the pot experiment showed that 7.

[Radiographic diagnosis of traumatic bronchial rupture].

Objective: To study the X-ray and CT findings of traumatic bronchial rupture for early radiographic diagnosis and treatment.

Methods: The chest plain X-ray films and CT images of 21 patients with traumatic bronchial rupture confirmed by operations or bronchoscopy were retrospectively analyzed.

Results: The main radiographic findings of traumatic bronchial rupture included interrupted tracheobronchial air column, atelectasis, lung ptosis, pneumomediastinum and subcutaneous emphysema, pneumothorax or hydropneumothorax.

[Dynamic contrast-enhanced CT patterns and pathologies of noncalcified pulmonary tuberculomas].

Objective: To analyze characteristic CT enhancement patterns of noncalcified pulmonary tuberculomas and their pathological basis.

Method: Fifty-six patients with noncalcified pulmonary tuberculomas underwent surgical resection of the tuberculomas. Enhanced CT images of these tuberculomas were reviewed and analyzed in relation to the histological findings.